Frequently asked questions

Cleaning removes visible dirt, while disinfecting kills microorganisms. Both are essential, but not every cleaner is a cleanroom cleaner. It’s a specialized skill. That’s why our Critical Cleaning Approach insists on using only trained personnel.

A biofilm is a thin layer of microorganisms, such as bacteria or mold, that attach to a surface and encase themselves in a protective layer of slime. A biofilm layer may look sticky or discolored, but often it can only be detected through laboratory testing. Want to learn more? Read our blog.

Start with an internal audit or risk analysis to identify any weak points in your processes or documentation. Update your protocols and procedures according to applicable guidelines, such as GMP Annex 1. Then validate your processes with measurements, document everything carefully for compliance, and train your team to master every step.

That depends on the results of the first step in our collaboration: a thorough scan of your current approach. Based on the results, our TRU Academy will create a tailored program for your team.

GMP-compliant cleaning is a controlled cleaning approach that meets the applicable GMP requirements and addresses the specific risks of a cleanroom. It’s not just about how the cleaning is carried out. Procedures, training, monitoring, and traceable documentation are just as important.

Not necessarily. Most particles and microorganisms can’t be seen with the naked eye. What’s more, GMP doesn’t just look at the cleaning result, it also considers how that result was achieved and how it can be demonstrated.

Cleaning removes dirt, residues, and contamination. Disinfection reduces or inactivates microorganisms. Proper cleaning is essential for a disinfectant to work effectively.

There’s no one-size-fits-all answer. The right frequency depends on the cleanroom classification, the activities carried out, the contamination risks, and the monitoring results.

Not every cleanroom needs to comply with GMP regulations. Depending on the industry, product, and activities involved, ISO standards or other specific requirements may apply instead.

Cleanroom cleaning can absolutely be outsourced to a specialized partner. Just make sure that responsibilities, procedures, training, documentation, and quality controls are clearly defined.

TRU supports companies and organizations with services including risk and gap analyses, procedures, cleaning validation, training, specialized cleaning teams, and digital documentation and follow-up.

Regular cleaning mainly focuses on visible dirt. Cleanroom cleaning is different. The biggest risks are often invisible: microorganisms, residues, and contamination from people and materials. That’s why cleanrooms require specific procedures, materials, training, and quality control.

Cleaning and disinfection are often mentioned together, but they serve different purposes. Cleaning removes dirt and residue, while disinfecting reduces the number of microorganisms. The order is critical: first clean, then disinfect. A disinfectant is far less effective on a dirty surface.

There’s no one-size-fits-all answer. The right frequency depends on the cleanroom classification, the activities in the space, the risk zones, and the monitoring and control results. That’s why a good cleaning program is always tailored to the specific environment.

Not every cleaning agent is suitable for cleanroom use. The right choice depends on factors such as surface type, contamination risks, required performance, and applicable regulations. Just as important, the product must be practical to use correctly and consistently in day-to-day operations.

Cleanroom cleaning validation demonstrates that a cleaning process is effective and consistently performed. In other words, you need to prove that the chosen approach is suitable for the environment and reliably delivers the expected results.

Good audit preparation doesn’t start the week before the inspection. You need up-to-date procedures, clear responsibilities, accurate records, and well-trained staff. Auditors don’t just look at the end result—they also evaluate the system behind it and how contamination risks are managed.