The bottle inside the Pet Lodge Water Tower Deluxe can be removed easily to allow you to refill and clean it with ease.
The manufacturer has not tested the Pet Lodge Water Tower Deluxe to be safe in the dishwasher therefore they recommend hand washing it using soapy water.
Per the manufacturer of the Pet Lodge Water Tower Deluxe, you can use a bottle brush cleaner with nylon bristles, there are some bottle cleaners available in different sizes, that can fit through the opening to clean the inside of the tank. They also mentioned using a warm soapy water mixture to clean or using a mixture of warm water with vinegar to soak the bottle and rinse out. For more information, the manufacturer can be reached at 1-866-260-0888.