A new study has found that most of us are putting on sunscreen wrong, and are only getting 40 percent of the SPF protection we think we are. While it's common knowledge that you need to cover all exposed skin in sunscreen, the study shows that most of us don't coat it on anywhere near thick enough.

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A new study has found that most of us are putting on sunscreen wrong, and are only getting 40 percent of the SPF protection we think we are. While it's common knowledge that you need to cover all exposed skin in sunscreen, the study shows that most of us don't coat it on anywhere near thick enough.