Question: what all is peroxide good for?
Answer: Remove Pit Stains. Let's face it, brownish-yellow armpit stains are embarrassing. ... 
Grow Mushrooms. It's crazy, but true. ... 
Clean the Dishwasher. Use hydrogen peroxide to clean out your dishwasher. ... 
Whiten Almost Anything, From Fingernails to Grout. ... 
5. Make a Mouthwash. ... 
Boost Your Laundry. ... 
Kill Mold and Mildew. ... 
Grow Your Garden.