Don’t brush your teeth in that nasty hand washing water or in the showers.
Just don’t do it.
Edit: to clarify, water refill stations are good, permanent bathrooms are good. Anywhere with a faucet is good. I am specifically referring to brushing your teeth at the portable handwashing stations by the campground restrooms and in the portable public campground showers. This is just based on my experience from getting sick in 2023 while brushing my teeth at these spots, vs in 2024 when we used a 5 gallon jug of clean water to use for teeth brushing and I felt great after. Yes I know well water is clean. Not everywhere at Bonnaroo has well water, just be careful where you brush your teeth at in the campgrounds 🤘🏼