Regular cleanroom cleaning helps maintain the required cleanliness level, protect products and processes from contamination, and keep equipment and work areas in good condition. It also helps facilities follow ISO 14644 cleaning requirements and relevant industry regulations, while reducing contamination buildup, production problems, and costly downtime.
Key Takeaways
- Follow ISO 14644 guidance and relevant industry requirements.
- Set cleaning frequency based on risk, use, and cleanliness needs.
- Use suitable tools, approved cleaning agents, and proper cleaning procedures.
Cleanroom Cleaning Tools and Materials
Cleanroom cleaning requires tools that minimize particle and fiber release and are suitable for the controlled environment. The exact tools depend on the cleanroom and surface being cleaned.
| Tool or Material | Typical Use |
| Cleanroom wipes | Cleaning workbenches, equipment, tools, handles, and other small surfaces |
| Cleanroom mops and mop heads | Cleaning floors, walls, ceilings, and large surfaces |
| Bucket or solution system | Holding and controlling cleaning or disinfecting solutions during mopping |
| Cleanroom-compatible vacuum | Removing suitable dry particles from floors, equipment, and difficult-access areas |
| Extension handles | Reaching ceilings, upper walls, and other high surfaces |
| Cleaning cart | Organizing and transporting cleaning supplies within the cleaning program |
| Approved cleaning agents | Detergents, IPA, disinfectants, or other agents selected for the surface and process |
Reusable tools should be cleaned, maintained, and stored so they do not become contamination sources. Where needed, facilities can also dedicate or identify cleaning tools by room, zone, or task to reduce cross-contamination.
What Cleaning Agents Are Used in a Cleanroom?
Cleanrooms commonly use cleanroom-compatible detergents, suitable-grade water, isopropyl alcohol (IPA), disinfectants, and sporidical agents. Each has a different purpose.
Cleanroom Detergents
Cleanroom-compatible detergents remove oil, grease, fingerprints, films, and process residue that water or alcohol alone may not remove effectively.
Apply the detergent according to its dilution and application instructions. If the product requires rinsing, remove the remaining detergent with the specified water grade so chemical residue is not left on the surface.
Suitable-Grade Water
Water is used to rinse cleaned surfaces, dilute concentrated products, and remove water-soluble contamination. The facility should specify water quality for each task. Processes sensitive to minerals, chemicals, or microorganisms may require purified water or another controlled water grade instead of ordinary tap water.
Isopropyl Alcohol (IPA)
IPA is widely used for wiping compatible work surfaces, tools, handles, and equipment exteriors. It evaporates quickly and normally leaves little residue.
IPA solutions around 70% are common in many cleanroom applications, particularly where microbial reduction is also intended. However, use the concentration specified in the facility procedure and check compatibility with plastics, coatings, adhesives, seals, and other sensitive materials.
Cleanroom Disinfectants
Disinfectants are used when the cleanroom must control viable microorganisms such as bacteria and fungi. First, remove visible soila nd residue that could interfere with the disinfectant. Apply disinfectant at its specified concentration and keep the surface wet for the required contact time. Wiping it dry too early can prevent the product from achieving its intended microbial reductions.
Sporicidal Agents
Sporicidal agents are used when the contamination-control program requires control of bacterial or fungal spores, particularly in certain sterile pharmaceutical environments. Follow the specified dilution, application frequency, wet contact time, and rinsing requirements. Because some sporicidal chemicals can affect metals, coatings, plastic, or seals, surface compatibility should be established before use.
How to Clean a Cleanroom Step by Step
Clean the cleanroom from top to bottom. Start with ceilings and other high surfaces when they are scheduled, then clean the walls, work surfaces, and equipment. Clean the floor last so dust or droplets from higher surfaces do not fall onto an already cleaned floor.
1. Prepare the Cleaning Supplies
Check the cleaning schedule to confirm which areas and surfaces need to be cleaned. Prepare the required cleanroom wipes, mops, mop heads, bucket or solution system, cleaning agents, waste bags, and other approved tools.
Make sure cleaning solutions are correctly prepared and labeled before use. Bring the supplies into the cleanroom according to the facility’s material-entry procedure.
2. Put On the Required Cleanroom Garments
Put on the cleanroom garments required for the area. These may include cleanroom clothing, gloves, shoe covers or cleanroom footwear, a mask, and a hood. Enter through the designated gowning area and avoid unnecessary contact with doors, walls, equipment, and other surfaces.
3. Remove Waste That Could Interfere With Cleaning
Remove waste bags, discarded materials, packaging, and other items that could interfere with cleaning. If there is a spill, clean it promptly using the cleaning agent and method specified for that type of spill.
4. Clean the Ceiling and High Surfaces
When included in the cleaning schedule, start with the ceiling, upper ledges, and other high surfaces. Use a cleanroom mop or approved extension tool with the specified cleaning agent. Work across the area in sections so the entire scheduled surface is covered. Pay attention to corners, edges, and accessible fixture exteriors where particles can collect.
5. Clean the Walls, Doors, and Windows
After the high surfaces, clean the walls from top to bottom. Continue with doors, door frames, handles, windows, viewing panels, and pass-through surfaces included in the schedule.
Use a cleanroom wipe or mop appropriate for the surface. Replace the wipe or mop head as specified rather than continuing to clean with heavily contaminated material.
6. Clean Fixtures and Other Fixed Surfaces
Clean fixed surfaces such as shelves, storage racks, cabinets, exterior light fixtures, and accessible grille or diffuser exteriors when they are included in the cleaning schedule.
Do not open or clean inside HVAC components, filters, electrical fixtures, or other controlled systems unless the task is covered by an approved maintenance procedure.
7. Clean Workbenches and Work Areas
Clean workbenches, tables, sample-preparation areas, packing tables, and other horizontal work surfaces. Remove visible residue first, then wipe the complete surface with the specified cleaning agent. Include edges and frequently touched areas.
If the area requires disinfection, apply the approved disinfectant after the required cleaning step and keep the surface wet for the specified contact time.
8. Clean Machines and Equipment
Clean accessible equipment surfaces such as machine exteriors, control panels, handles, guards, frames, bases, and other frequently touched parts.
Use the cleaning agent approved for the equipment. Follow the manufacturer’s instructions around displays, sensors, electrical components, openings, seals, and other sensitive parts.
Machine interiors and product-contact components should be cleaned according to their equipment-specific procedure, especially when disassembly or validated cleaning is required.
9. Clean Carts and Movable Equipment
Wipe down cleanroom carts, mobile racks, stools, containers, and other movable equipment used in the room. Where permitted, move mobile equipment so the surfaces and floor underneath can also be reached. Return each item to its designated location after cleaning.
10. Remove Loose Particles From the Floor
If loose particles are present, remove them before wet mopping using a cleanroom-compatible vacuum or another approved particle-removal method. Pay attention to corners, edges, underneath movable equipment, and other areas where particles collect.
11. Mop the Floor
Clean the floor last using the approved cleanroom mop and cleaning solution. Start at the area farthest from the exit and work toward the door when the room layout allows. Mop the floor systematically so the entire surface is covered while avoiding unnecessary traffic over cleaned sections.
Change mop heads and cleaning solution according to the cleaning procedure so collected contamination is not redistributed around the room.
12. Inspect the Entire Cleanroom
After cleaning, walk through the room and inspect the completed surfaces. Check for particles, dust, stains, process residue, streaks, spills, standing liquid, and missed areas. Reclean any surface that is not satisfactory.
Remove used wipes, mop heads, waste, and disposable cleaning materials. Clean and store reusable cleaning equipment in its designated location.
13. Complete the Cleaning Record
Record the cleaning activity according to the facility’s documentation procedure. The record should identify the room or area cleaned, date and time, cleaning performed, operator, and any problem or deviation found during cleaning. Where the facility requires additional inspection or environmental monitoring, complete it before the cleanroom is released for normal use.
Daily Cleanroom Cleaning
Daily cleaning focuses on surfaces exposed to contamination during normal operations. Clean the floor, active workbenches, high-touch surfaces, equipment exteriors, work carts, and waste collection areas. In production, testing, or packing rooms, include the surfaces actively used during that shift.
Remove spills and visible process residue as soon as they occur. Critical work surfaces may also require cleaning before operations, between products or batches, or after activities that could introduce contamination.
Weekly Cleanroom Cleaning
Weekly cleaning extends to surfaces that are not handled constantly but still collect particles and residue. Typical areas include doors and frames, accessible wall sections, shelving, storage surfaces, mobile racks, pass-throughs, viewing panels, and areas beneath movable equipment. Move carts, racks, or other mobile items so hidden surfaces and the floor underneath can be reached.
Monthly Cleanroom Cleaning
Monthly cleaning targets high and less accessible areas that are outside the normal daily and weekly routine. This can include scheduled ceiling sections, upper walls, high ledges, accessible light-fixture exteriors, approved grille or diffuser exteriors, corners, joints, and difficult-to-reach spaces around equipment.
During cleaning, check for cracked sealant, damaged coatings, rough surfaces, or deteriorated joints. These defects can trap contamination and should be reported for repair. Filters and internal HVAC components belong to the applicable maintenance procedure rather than normal room cleaning.
Periodic and Shutdown Cleanroom Cleaning
Periodic cleaning covers areas that require equipment movement, production stoppage, or special access. The facility may schedule this quarterly, semiannually, during planned shutdowns, or at another established interval.
Typical tasks include cleaning behind fixed machinery, beneath large equipment, air showers, pass-through chambers, hoods, cold boxes, designated drain areas, and other normally inaccessible locations.
A shutdown is also an opportunity to clean surfaces exposed during equipment servicing or facility maintenance. Complete the required recovery check before restarting controlled operations.
Cleaning After Maintenance or Repair
Maintenance requires additional cleaning because repair work can introduce contamination that is not normally present during cleanroom operations. Examples include dust, metal particles, lubricants, tools, replacements, and packaging debris. After the repair, first remove tools, packaging, spare parts, and visible debris. Then clean the repaired equipment and nearby surfaces affected by the work.
More extensive recovery may be necessary after construction, major equipment servicing, work above ceiling, ventilation system maintenance, or other activities that disturb the controlled environment. In these cases, complete the specified recovery cleaning and required checks before returning the affected area to normal use.
How Do You Verify Cleanroom Cleaning
Verification determines whether cleaning achieved the required result rather than simply confirming that the task was performed. Start with a visual inspection for remaining particles, stains, films, streaks, spills, chemical residue, or missed areas. Any unacceptable surface should be cleaned again before the task is closed.
Where measurable surface-cleanliness limits are established, additional testing can be used. ISO 14644-9 addresses surface cleanliness by particle concentration, while ISO 14644-10 addresses surface cleanliness by chemical concentration. ISO 14644-13:2026 provides guidance for selecting and assessing cleaning methods intended to achieve specified particle and chemical surface-cleanliness levels.
Monitoring results are most useful when reviewed over time. Repeated contamination in the same location can indicate a source such as equipment, material transfer, personnel activity, or the manufacturing process that needs correction.
Cleanroom Cleaning Standards and Guidance
The following standards and recommended practices support different parts of a cleanroom cleaning program.
ISO 14644-5:2025 — Cleanroom Operations
This standard requires an operations control program for maintaining specified cleanroom cleanliness levels. Cleaning is one part of that program, together with personnel practices, material entry and exit, maintenance, and monitoring. It does not prescribe one universal daily, weekly, or monthly cleaning schedule.
ISO 14644-13:2026 — Surface Cleaning
This standard provides guidance for selecting and assessing cleaning methods used to achieve specified particle and chemical surface-cleanliness levels. It considers the required cleanliness, contamination present, cleaning method, and compatibility between the surface and cleaning technique. It does not provide a universal surface-by-surface cleaning procedure or cover microbiological surface cleanliness.
IEST-RP-CC018.6:2026 — Cleanroom Cleaning and Sanitization
This recommended practice provides more practical guidance for cleanroom housekeeping. The 2026 edition addresses cleaning frequency, residues, surface coverage, bucket-change practices, specialized cleanroom areas, and recovery following planned or unplanned disruptions.
Cleanroom Cleaning Checklist
Use this final check before completing the cleaning record:
- Were all surfaces scheduled for this cleaning cycle completed?
- Were the specified cleanroom tools and cleaning agents used?
- Were the required chemical concentration and contact time followed?
- Were contaminated wipes, mop heads, and cleaning solutions replaced as specified?
- Were used cleaning materials and waste removed?
- Were missed or visibly contaminated areas cleaned again?
- Was any required inspection or monitoring completed?
- Was the cleaning activity documented?
Conclusion
Effective cleanroom cleaning requires the right tools and cleaning agents, a clear procedure, and the right cleaning frequency for each surface. Regular inspection and monitoring also help confirm that the required cleanliness is maintained.
A well-designed cleanroom makes these tasks easier by providing smooth, cleanable surfaces, sealed joints, and accessible areas. Sunnyda Clean Room combines these practical design considerations with controlled-environment requirements and a manageable working environment.
Frequently Asked Questions
How often should a cleanroom be cleaned?
Cleaning frequency depends on how the surface is used. Floors, active work surfaces, and high-touch points often need daily attention. Secondary surfaces can be cleaned weekly, while ceilings, high surfaces, and difficult-access areas may be placed on monthly or periodic schedules.
Does ISO 14644 specify a daily cleaning schedule?
No. ISO 14644-5:2025 requires a cleaning program within the cleanroom operations control program, but the facility establishes the cleaning frequency needed to maintain its specified cleanliness levels.
What cleaning agents are used in cleanrooms?
Common choices include cleanroom-compatible detergents for oils and process residues, suitable-grade water for rinsing, IPA for compatible surfaces, disinfectants for microbial control, and sporicidal agents where spore control is required.
Is 70% IPA used for cleanroom cleaning?
IPA at approximately 70% is commonly used in many cleanroom applications, particularly on compatible surfaces where microbial reduction is required. The actual concentration and contact time should follow the approved cleaning procedure and product instructions.
What is the difference between cleaning and disinfecting?
Cleaning removes particles, dirt, oils, and chemical or process residues. Disinfection reduces viable microorganisms. A cleanroom that requires microbial control may therefore need both cleaning and disinfection.
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