Kitchen Booster with Seat Pad & All Plastic Kitchen Boosters – We recommended kitchen boosters be cleaned before the first use and after each use. Wipe with a soft cloth and warm soapy water. Use only mild, non-abrasive soap. Trays with metallic components such as screws, springs, etc., are to be cleaned with warm, soapy water and wiped dry with a soft cloth. All plastic trays and tray inserts are dishwasher safe (top rack only). If you are unsure whether the tray on your kitchen booster is dishwasher safe, please reference the instruction manual for your booster.