What is the preferred method to clean the inside of water bottle caps. I use Purist bottles and caps on the bike and Nathan squirt style caps for running. Both of these get really nasty black crap.. mold? inside them after a while and it is really hard to get them clean. Thought about boiling them? Anyone have a good method? I realize I could simply replace them but they're not cheap and neither company sells just the caps?
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Team Every Man Jack
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