The food processing environment is ripe with hot spots where biofilm can hide. A rapid biological hygiene indicator in the form of a spray gel has been developed to provide companies with a visual indication of biofilm on a surface. Once the gel makes contact with biofilm it produces foam within two minutes. Manufactured by Sterilex, Indicon Gel does not require mixing and is appropriate for seek-and-destroy missions. It enables detection of microorganisms that include Listeria, E.coli and Salmonella on both large surfaces as well as niches that cannot be accessed by a swab.