Do you think you take good care of your skin? Believe it or not, even if you wash up every night and wear sunscreen at the beach, you may still be committing one of these common skin sins. Read on and change your evil ways!

#1: Washing too often. Unless you’re a super-oily teen, you probably only need to wash your face at night, to remove the dirt, oil, and makeup of the day. In the morning, warm water and perhaps a swab of toner will do. Over-washing dries out the skin, which actually leads the body to produce more oil.

#2: Over-exfoliating. Two or three times a week will do it; every day is irritating and can cause redness and dry skin.

#3: Not wearing enough sunscreen. You need SPF 30 on a daily basis, even when it’s partly cloudy, since those harmful UVA rays can still filter through. Use a shot glass’ worth for your body and a teaspoon on your face (apply it in layers if need be). And apply it all over: your clothes may offer an SPF of as little as 4-10. Oops!

#4: Not reading product labels. Mixing multiple products with retinoids or other irritating ingredients can inflame the skin. Others may make skin more sensitive to the sun, so stay informed!

#5: Getting impatient. On average, anti-aging or other specialty topical products take weeks or months of regular use to show results, so don’t give up after one week.

#6: Lifestyle abuse. Not enough sleep, water, and vitamins damage the skin. So do too much alcohol, sugar, or other toxins. And bad habits like smoking or tanning? Don’t even get us started!

#7: OD-ing on foundation. It settles into fine lines, creates creepy mask-face, and generally makes you look older. Do yourself a favor and get a lightweight, moisturizing formula, then apply it sparingly. Your face will thank you!

#8: Not getting a cancer check. Head in to your skin doctor for a yearly check-up, and sooner if you notice any new moles; it’s important even if you’re not fair-skinned, since many types of skin cancer are easily treatable if caught in the early stages.