Tip - Why does shampoo lather less in dirty hair than clean hair? • /r/askscience

Published 9 years, 6 month(s) ago | Submitted by heather herron

It had been a long sweaty and dirty weekend cutting firewood, hanging drywall, and whatnot. I was somewhat surprised to find that when I used my...
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Posted: 9 years, 6 month(s) ago

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