Hello Joanie, Aside from the obvious choice of banning all nut based products from school, here is what we learned IS effective: We tested a disinfectant cleaner for the removal of peanut butter. Found that there were levels of peanut oil remaining on the surface. It required a good cleaner/degreaser type product to remove these oils. It would be necessary to use a cleaner or pot and pan detergent type product and then follow-up with a food contact sanitizer. To remove peanut butter and its oils would require a product that has potential to break down oils and greases. Disinfectants are not good at removing these types of soils. Our 2 products that would serve this purpose include: Green Solutions Industrial Cleaner Sani-T-10 Food Grade Sanitizer Spartan Chemical Company, inc. Sani-T-10® 12 (480002) Product Details: SANI-T-10 was formulated as a DISINFECTANT, SANITIZER, ALGAECIDE, and DEODORIZER. It can be used for anything from disinfecting hospital rooms and rinsing bar glasses, to keeping algae growth from occurring in pools. SANI-T-10 does not contain cleaning agents, perfumes, or any other additives that can be a problem in food-contact areas. SANI-T-10's properties make it an especially good product wherever a germicidal rinse is required. It can be used in hospitals, bars, schools, motels, morgues, and grocery stores where bacterial contamination is a problem. Color Clear Scent none pH 7.0 - 8.0 Dilution .25 OZ./GAL. Product Code: Bar Code: Size: 480002 10753727033956 2 LITER 4/CS Green Solutions® Industrial Cleaner 105 Product Details: Green Solutions Industrial Cleaner is a non-toxic, heavy-dut y product, formulated to tackle difficult cleaning tasks. Formulated with a super surfactant cleaning system, the concentrate is engineered to quickly remove petroleum-based soils with efficiency. Any other questions, please let me know. Sincerely, David Hughes / Foley Distributing Account Executive Cell: 802-233-0440 Office Voice Mail: 800-950-3738 ext. 230 Foley Customer Service: 800-950-3738 x202 Home Office Email: dhugs34@aol.com Company Email: dhughes@foleydistributing.com Website: www.foleydistributing.com