awavauatush @ninjawedding
hmm apple cider vinegar seems like it does quite a lot of helpful things related to removing human residue:

- can be used to clean shower caps
- removes hair product build-up
- dissolves flaky skin that can occur e.g. on the heels

vinegar of course is an acetic acid solution, and I was curious if there was any research on this, because acetic acid is some pretty nasty shit. first paper I've seen so far:
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oh or instead of searching pubmed I guess I could have just checked Wikipedia, huh