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Check that the bottle is dishwasher safe. Put the bottle in the dishwasher. Clean the bottle regularly.

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Most water bottles made of metal, stainless steel, and glass are dishwasher safe. Check the label on the bottle to make sure it is safe to put in the dishwasher. If the water bottle is made of plastic, it may not be dishwasher safe. Putting it in the dishwasher can warp or damage the plastic. Place the water bottle in the dishwasher, separating the lid from the bottle. Put the bottle on the dishwashing rack upside down, with the mouth facing downward. Run the bottle through the dishwasher on the gentle or normal cycle. The cycle should include a drying phase, where the bottle is dried well in the dishwasher. To avoid the buildup of germs and bacteria, get in the habit of cleaning the bottle every few days. Run the water bottle through the dishwasher every few days or at the end of every day, especially if you use it on a daily basis. This will help to keep the bottle clean and ensure you are drinking fresh, germ free water every day.