To clean and disinfect your Waterpik flosser soak the waterpik flosser in 2 parts water, 1 part hydrogen peroxide or white vinegar for 5 minutes.
Vinegar and hydrogen peroxide is a disinfectant and cleans and disinfects your Waterpik flosser.
This is the way I disinfect my waterpik flosser.
I always rinse out the waterpik flosser reservoir after every use to keep it clean.
Also you should replace the Waterpik flosser tips every 3-6 months to prevent bacteria and keep your teeth clean and healthy.
Also the water flosser tips sometimes become clogged and/or affected by mineral deposits and is another good reason to replace the water flosser tips.