I have decided to go bleach free and buy eco cleaning products for all the usual reasons so have stocked up on Ecover toilet cleaner, spray etc the only problem I have is the cat litter box. Every day it is emptied and changed and every 3 days I usually soak it in bleach, I have had to buy some disinfectant for the job but ideally want to cut this out too. It absolutely stinks and I need something that will kill the smell and clean it. I think the smell is ingrained into the plastic now so am purchasing a new one, how can I keep it not smelling like a cats toilet too much?