keeping multiple levels clean

I like the multiple level ones, but how do you clean them?

We are always taking the wet shavings out from under the water bottle because every waterbottle we had seems to make water in the cage, maybe they shake it too much. I tried a water dish but they put their paws in it and poop in it so no go. If I had a high level on top of another, how do you get in to empty the bottom level.

I also like all the stuffed beds and that but how do they not poop or pee on them. with so much stuff in there how would I be able to clean it good. Also how often do you empty the entire cage of shavings.

With the upstairs, do the pigs ever fall off of the second floor. that makes me worry about that, but I would like to add a second floor. I glued popsicle sticks on the ramp but they chewed them off. I thought about carpet, but they pee on the ramp so much I would never be able to get the smel out of it. I also worry about them eating the rug. I just made a small ramp out of coroplast and glued popsicle sticks on, but that was to get to a small loft that only covored half oof the cage. I took the loft down to chamge the size and shape of the cage. Now I am thinking of the best cage set up to do.