While there’s no hard and fast answer to the question of how often to wash your water bottle, most manufacturers agree: Water bottles should be cleaned at least at the end of every day of use. Personally, washing my water bottle isn’t always high on my priority list, but after reading up on the topic, I aim to try harder.
Here’s the scoop on the recommended cleaning methods for various types of bottles. Don’t forget to wash all caps and lids too, paying special attention to nooks and crannies where germs can hide.
If your bottle starts to smell a little “off,” fill it with hot water and let it sit overnight.