Put the cat in the bag.

'I used to work at a pet store, and once we got in a shipment of cat washing bags. Basically a mesh bag, similar to a lingere bag, that you were supposed to put the cat in, tie up, and then proceed with washing.

There was a cartoon diagram on the package of a cat tied up in the bag One of the stockers who had trouble reading english asked me with the most horrified look on his face if it was a bag for killing cats.'

How To: Wash A Cat For Cheap