lol that’s the worst

I hope your immune system got stronger from the workout (and that you didn’t get sick)

If you have any sugar in your drink (including: milk, fruit tea) you need to rinse it out daily or you will get a rotten stank/flavor that doesn’t seem to wash out.

To get rid of it, you just need to remove any seals and soak everything in warm water with a little denture cleaner or oxi-clean. I usually just put the gaskets inside the cup with a little cleaner, set the lid on, and fill it until it just starts to overflow. This will also remove any tea/coffee stains and you can use those to gauge whether it has soaked long enough.