That's a good point Herbi. Wood can harbour mites/eggs in little cracks if the hamster gets mites and it can be expensive replacing accessories. I guess we just have to hope a hamster doesn't get mites. I'm paranoid about freezing any wood or hay items before using them. I don't think a new house would have a problem like that though, so Flower Fairy needn't worry
I only freeze the wood items in case of woodworm lol. Hay items I freeze in case there are mites in the hay but that might be a bit overzealous!