When we hand over a newly commissioned cleanroom to a client, one of the first questions we hear is, "So… how often do we actually need to clean this?" Our answer might surprise some: at a minimum, once every single day-and in critical zones, sometimes multiple times per shift.
Here's the reality: a cleanroom isn't "clean" because it's sealed off from the world. It's clean because you actively fight contamination, 24/7. People shed particles. Equipment generates static. Processes leave residues. Even with perfect airflow and HEPA filtration, surfaces accumulate contaminants over time-and if you don't remove them, they become airborne again.
At our firm, we don't just hand over a cleanroom and walk away. We help clients develop a tailored cleaning schedule based on ISO classification, process sensitivity, and risk assessment. For example, an ISO Class 8 secondary area might get a thorough wipe-down once daily. But in an ISO Class 5 aseptic filling zone? We recommend surface disinfection before each batch, plus mid-shift cleaning if operations run long.
And it's not just frequency-it's how you clean. We specify non-shedding wipes, validated disinfectants, and cleaning protocols that move from cleanest to dirtiest areas. Mop buckets? Only if they're cleanroom-grade with HEPA-filtered water systems. Dry sweeping? Absolutely not-it's a particle storm waiting to happen.
So yes: clean daily. Clean critical zones constantly. And never assume "it looks clean" means it is clean. In our line of work, discipline beats assumptions every time. After all, a cleanroom isn't a place-it's a process. And that process starts with the mop.
Suzhou Pharma Machinery Co.,Ltd.
2026/01/28
Mia
