As seen in the March issue of Shape Magazine, Pitstop is the first ever stain remover to effectively eliminate underarm stains as well as ring around the collar. This product is best used by pre treating the entire stain, rubbing together (or using a small brush) and letting it sit for 15-20 minutes before laundering. What a great way to save those white shirts with the stains! Every woman has a white shirt she has had to throw away or a husband who continues to wear his. If you have treated your armpit stains with bleach the stain is permanent and unsalvageable. Throw out the garment and test PITSTOP on stains that have not been treated with bleach. Retweet using the Tweet button. If you would like to win your own bottle, post below!