Sunscreen Myth #7: Last year's bottle is still OK.
"You should use enough so that you're not using the same bottle summer after summer. If you're doing it right, you're not going to have leftovers next year," Stein says.
Check the expiration date on your sunscreen bottle.
"Some sunscreens break down quickly, especially the ones that give you UVA protection. So it shouldn't sit in your bathroom cabinet for too long," Stein says.
Spencer discloses that he has consulted for L'Oreal. Stein reports no disclosures.