I use the bottle and to clean it I just wash it with soap and hot water and then I put vineger in it and let it sit for about 30 minutes and then rinse, rinse, rinse. I boil water ever night and keep it in glass jar of sports bottle and I also warm the water in the 8 oz bottle for 20 seconds (in the microwave) then I shake it up to make sure there are no hot spots. I also always have two bottle and rotate them every other day so that one had enough time to dry out.