rinse and let dryafter use.
Occasionally add some listerine / mouthwash to it, helps keep clean and minty fresh breath
I’m a rinse and let dry type too…even if it had sports drink.
I don’t know what I do wrong when I use dishwasher or handwash with soap but my bottles ALWAYS end up having a soapy taste if I try either of those–no matter how well I rinse.
But I do love bleach so maybe I’ll have to give that a whirl.
In general I just use bottles I don’t care about so that when they get REALLY worn I can just pitch them. That and I try to remember which ones I have used for sports drink and which have only had water in them. The water ones tend to stay a bit better.