I agree with DexterChloe. When I first got Screech, she made a nest in the tubes. I kept emptying it every morning and placing the bedding in a hide. She got the idea and now she is in a a larger cage, she still has the tubes as she uses them to go from one level to the other, but she is older and doesn't make nests in them.
The hams will love going through the tubes and it is a decision to make wether to remove the tubes or keep emptying them daily until the ham stops.