That is a part of the reason that I like to take my out a few times for a good several hour soak… The cage, plant everything gets rolled outside and the hose taken to it. The poo on the plants gets washed to the bottom, the chameleons drink tons, and everything gets washed. Then while I have them out giving them there inspection I open up the bottom door and blast all the dead bugs, leaves, and poo out… When I am don’t everybody is happy! No more mess, some sun and water filled chameleons and a clean cage.
My 10gal cricket cages I will put a half cap of bleach in, fill it up and let it set for a few hours, then I dump it out hit it with the hose and its good to go.