I am a newbie... since December when I got my two ragdoll cats. I have a water fountain which they love. However, I was a little concerned about the cleanliness of the fountain. You fill the reservoir but even putting in fresh water every couple days seems to leave a possibility of germs. There is a filter and i rinse it with every change. I take it apart and clean it with bleach and soap once a week. What does everyone else use for a watering hole? I am curious?