My apologies if this issue has been addressed before, but i'm about to go to bed and my eyes are too tired to look through hundreds of threads...

How do you guys deal with your smelly water bottles? I have two polar bottles, and one of them just started to stink. Like wet dog. It is gross. I found mold in it and scrubbed it out. I also realized BF put his dirty bottle top on mine while he took my clean one !

How do you clean these things? With vinegar? Dishwasher? I let it soak in soapy hot water for an hour, and the smell went away. I let it air dry, made sure to double check it was dry before I put it away, and I just pulled it out and it smells again!

I really should buy new ones, but these aren't even a year old. And I had to order them online because I couldn't find the pink ones anywhere in stores here.

TIA.