We asked a dermatologist to break down just how often you should be shampooing your hair.
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30 things people do that hairdressers find pleasant or annoying
"Please don't keep your eyes open when washing. It's kinda awkward if you know someone is staring right up your nostrils." ...
These surprisingly simple rituals—from silk pillowcases to strategic washing schedules—separate those with perpetually gorgeous locks from the rest of us struggling with bad hair days.
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