Subject: How To Properly Clean Your Commode This was simply too much of a time saver not to share it with you. 1.. Put both lids of the commode up and add 1/8 cup of pet shampoo to the water in the bowl. 2. Pick up your cat and soothe him while you carry him towards the bathroom. 3. In one smooth movement, put the cat in the toilet and close the lid (3 comments)