We have an issue with Listeria mono found on the bottom of our shoes. We have switched our foot foamers (they spray sanitizer foam onto the production door entry walkways every 20 minutes) to Quat instead of peracetic acid. We have instituted mandatory spraying of shoes when entering the building and when entering the warehouse/GMP zone. We have a captive shoe program in our facility but there is the possibility that L.mono is picked up in the common areas such as locker rooms and break rooms where outside and captive shoes are both touching the floor. We have also instituted mandatory shoe cleanings every Monday for all shifts. Our process is composed of dry powders and syrup/butter, which is why we have door foamers to all the entrances to our production room. We wet clean the entire room and production line every night. We have also put dry foot baths with quat crystals in the changing rooms for employee outside and captive shoes to go through. The shoes are changed yearly when we have a shoe truck come to the facility.
With all of the above items we have done, we are still getting L.mono hits on our employee captive shoes. Does anyone have any suggestions as to how to get rid of the L. mono? Any suggestions for a good shoe cleaning program?