Joie's Shroom Microwave Cleaner steams microwaves clean for a thorough cleaning. Made from BPA-free plastic and silicone; microwave safe; measures 5.5 x 4 x 4-inches. Let off some steam to loosen stuck-on food inside the microwave. Simply add water with a splash of white vinegar and microwave as directed; easily wipe away stuck-on grime after steaming the microwave clean. Hand wash in warm, soapy water