I seem to remember another set of instructions.....

1. Add cat shampoo to toilet tank.
2. Wait until the cat is sleeping and then (this is VERY important) IN ONE SEAMLESS MOVEMENT scoop up the target cat, place it in the toilet, QUICKLY close the lid and sit down.
3. Flush once for shampoo
4. Flush twice for rinse
5. Run like h*ll!!

(For entertainment purposes only, please do not try this with your cat, neither you nor your toilet will survive.)