Lotions, Hairspray and other products
...that contain chemicals or fragrance.
People often don't equate their hand creams with fragrance, but they are usually sharply fragranced!
If you have a creame that you must apply, do it well before class and rinse it off about a half hour before with fragrance free soap.
You'd be suprised what Aloe Vera and Vit E. can do for your skin, and they usually cost a lot less!