I've never touched a bird before and I'm unsure of how to go about cleaning the cage. I've been researching as much as I can about birds and most sources suggest not touching or holding the bird until they go up to you and aren't afraid. My husband tilted the travel crate-thing to get them to go in the cage. Any time they see my hand in the cage, they hiss and either climb away or lunge to bite me. Do I have to take them out of the cage to do the weekly deep-clean?