easy and simple. Use an appropriate sized PVC tube (cut to 18 to 24 inches) and leave it in its cage. It will start to use it to sleep in. Do your cage maintenance at night. Just remove the tube with the iguana in it and clean the cage. 95% of my lizards will stay in the tube because they feel safe. Just in case your lizard falls in that 5% category, be ready to grab him and or put the head side of the tube against a wall so it cant dart out.