Check the listing for details. Water & Vinigar Cup With Openings on Top Mystery Solved Microwave Cleaner. Condition: Used. Listed at 18.27 USD. You put water and vinegar in it and clean your microwave with it. First washing it with hot water and Norwex cloths. Then I was concerned with those nasty cleaners I used, that didn't get everything either and what helped the most was putting water in a pyrex bowl and bringing it to a boil so the steam could help.