How to Wash the Cat... 1. Put both lids of the toilet up and add 1/8 cup of pet shampoo to the water in the bowl. 2. Pick up the cat and soothe him while you carry him towards the bathroom. 3. In one smooth movement, put the cat in the toilet and close both lids. You may need to stand on the lid. 4. The cat will self agitate and make ample suds. Never mind the noises that come from the toilet, the