The trimming trays can be clean by cleaning them with a clean cloth or using a soft cloth dipped in the rubbing alcohol to remove any microbes. Repeat the procedure several times and leave to dry after rinsing it with water. The upper pan of the tray has an integrated mesh that needs to be clean with special attention using a silicon brush or a clean cloth dipped in rubbing alcohol. It can also be washed with soapy water but be careful as the soap pieces may be left into the mesh. After that leave the pan to air dry.