I agree fully with Paul but if you are going to go to the effort of trying to sanitize your cages, then buy top line sanitizer such as the one I use to kill mold on my garage.
The initial cost will be higher but you will be using a product that is more effective than bleach.
I have gotten, and now have several gallons of a hospital level killer that came as a freebie with my mold killer.
I have not used it but hearing the stories here I think I will at least give some of my tools a bath.
I use RMR86 but there are others that kill nasties far better than simple bleach.
I do trim my plants to keep air flowing through and treat them with Serenade.
