I dont know how you could hurt it other than dropping a heavy object or person directly on it.

Rodents would likely get trapped in the bag and drown in a swirly vortex of death. I get frogs sometimes that way.

Bag couldnt be easier to clean and I expect its going to last as long as the device itself. Even if it didnt last I'd still buy a new one every year now that I cant live without it. Anyways....mine is as the day I bought it.

Ya I get the bubbles too. doesnt hurt anything as far as I can tell.