Zorak digs black soldier flies and hornworms the most,but is a voracious eater lol so really and of the normal cham foods except silks! He has been offered them a few times and he doesnt care for them!
I use a shop vac for everything 1x a daily. Gets all the water up and anything else. I bought a bucket head vac from home depot and it is just used for this task,it rocks.