You're probably putting on sunscreen all wrong — here's how to apply it the right way, according to a dermatologist

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• Dermatologists say you should re-apply sunscreen every two hours, especially when you're at the beach or outside for extended periods of time.
• You can still get a tan with sunscreen on, because while sun creams block many damaging skin-burning rays, they're not as great at filtering out the milder rays, which penetrate deeper into the skin.
• Sun burns can lead to skin cancer, which is why it's important to wear some protection when you're exposed to the sun...