Why Fitness Instructors need waterproof microphone?

The hot summer is coming which means it's a sweaty season as a professional Fitness Instructor in fitness clubs environment, And during your classes teaching there are so much sweat will be easily goes into your microphone capsule and damage your microphone dead or corrosion, This is the reason why some of instructors found their mic dead on class or after class or even few days latter it doesn't works. It's all because of the sweat damaged your microphone capsule. So it's very important for a fitness instructor to choose a REAL waterproof microphone! The waterproof microphone can blocks the sweat away from your microphone capsule and connector.