After all, sunscreen is your best defense against skin cancer and premature signs of aging.

But incorrect app is all to common.

Little mistakes can cause big problems, preventing you from getting the protection promised on the bottle.

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Applying sunscreen correctly ensures youre getting the best protection.

Below, seven dermatologists share everything you gotta know about how to apply sunscreen.

How to apply sunscreen correctly, according to dermatologists

1.

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board-certified dermatologist and assistant clinical professor at Icahn School of Medicine at Mount Sinai

SPF stands for Sun Protection Factor and dermatologists recommend thatyou use sunscreen with a minimum of SPF 30.

So the higher an SPF you use, the better your protection.

(Also,verify its not expired.)

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And while chemical sunscreen may blend into wet skin, its not going to work as well.

If youre applying it to wet skin, then thats going to affect the absorption of the chemical sunscreen.

Then, let the sunscreen dry before you put on any makeup.

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Your skin-care routine should take several minutes, says Dr. Chi.

Dont treat it like a perfume where you hope the droplets land correctlyactually rub in the spray.

For sticks, always apply sticks two times on the area being treated, she adds.

Black hair woman wearing a grey and white bra giving herself a deep cleansing session with a face brush and Gatineau skincare face wash lotion, after her shower. Studio skincare portrait over isolated background.

board-certified dermatologist and assistant clinical professor at Icahn School of Medicine at Mount Sinai

Even if youre applying SPF 100, you must re-apply every two hours.

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A curvy woman applying cleansing balms and smiling to her reflection in the mirror.

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