I clean mine in the dishwasher once a week and they all stay spotless.
What kind of bedding are you using?
Oh yes - every day. I am thinking its just the oil from their skin/scales. I use coco soft for substrate. Thats almost never in the water, but I don;t know if it has properties that make it prone to clouding.
Harden H. Honey 2 BP's (Marlett & Rodzellar) "Go Human, Go!" - Quaker Foods Inc.