While cat water fountains have filters that keep the water free of cat saliva, food crumbs, hair, and other contaminants, your fountain will still need regular maintenance. Most manufacturers recommend changing the filter and thoroughly cleaning a fountain once a month. Cleaning typically involves disassembling the fountain, wiping down all surfaces with soapy water, then rinsing thoroughly. Many models we recommend have dishwasher-safe components as well. With many models, you will also have to clean the pump periodically since internal propellers and other areas can get clogged with your cat's hair, reducing the flow of water. Pipe cleaners and narrow, stiff scrub brushes are often best for cleaning smaller components.