Fury Mama is the best way to clean your microwave quickly, in just a few minutes. Usage instructions: 1Remove the hair and lift the head up. 2Add vinegar up to the mark. It degreases your microwave without detergent in just 7 minutes. After a few minutes in the microwave, the steam starts to vent from the Fury Mama head and removes dirt and stains from your microwave. Made from heat resistant materials.