What is the best way to clean biofilm?

How to Effectively Clean Biofilm: Beyond Bleach

When it comes to tackling biofilm—those stubborn, slimy layers of microorganisms that cling to surfaces—many reach for bleach as a go-to solution. While bleach does have some disinfecting power, especially against certain thermophilic bacilli, it’s not always the most reliable option on its own, particularly when dealing with resilient biofilm formations.

Alkaline cleaners offer a smarter, more effective approach. Unlike bleach, which may only provide intermittent results at food-safe concentrations, alkaline detergents are specifically designed to break down the complex matrix of proteins, polysaccharides, and microbial cells that make up biofilm. They penetrate the structure more thoroughly, loosening the grip these colonies have on surfaces.

This makes alkaline cleaners especially useful in environments like food processing facilities, breweries, or healthcare settings, where biofilm can pose serious hygiene risks. Used correctly, they not only clean but also help prevent future buildup by removing the conditions that promote microbial adhesion.

For best results, cleaning should be a two-step process: first, apply an alkaline detergent to dissolve and lift the biofilm, followed by a sanitizer like bleach to ensure any remaining microorganisms are inactivated. This combination leverages the strengths of both chemistries—mechanical removal and microbial kill—without relying solely on bleach’s limited penetration power.

Regular cleaning routines that include alkaline detergents are far more likely to keep biofilm at bay than sporadic bleach-only treatments. In the long run, it’s not just about disinfection—it’s about disruption. And when it comes to breaking the hold of biofilm, chemistry matters.