they are tough to wash i have a real big one for my bearded dragons acrylic cage because the hammocks with suction cups started to become weak as my dragon grew and not stick to acrylic. I would have to say though they are a strong and quality product if it can hold my 600 gram beardie. however i do not really wash it i just seem to be easiest to vaccum of.
I just picked up two large rock ledges off amazon and my leos love them, the only thing that I didn't really like is that since I have a 75 gallon aquarium that mine are in so the magnetic strength isn't as good as I hoped but it's definitely strong enough for my leos even with 1/4 inch glass... I haven't had to clean mine yet but the leos shouldn't make it too dirty