I do cage cleanings once a week as well. As far as complete tear-downs with disinfecting the entire cage/furniture, that only happens once every 3 months for me. Being that I have so many cages though, I'm still doing it once a month, just have three different cycles.

Like Shelby said, the water bowl gets disenfected EVERY week... (or disposed of and replaced, in my case )... the substrate gets changed every week, and poop, urates and shed skin is removed upon sighting.