Apply 2-3 swipes to clean underarms and re-apply throughout the day, if needed. This product is highly concentrated and should not stain clothing so long as the proper amount is used. If you do experience staining, use less product or blot underarms with a dry washcloth after application to remove excess.
If you have a history of sensitive skin, perform a spot test on the inside of your wrist for 2 to 3 days prior to using. To prevent sensitivity to baking soda, do an apple cider vinegar wash before applying. Shave armpits in the evening to prevent irritation.