Cats are generally very good at grooming and keeping themselves clean. If you need to bath your cat for example a flea bath, good luck! But seriously, you can use a treated pet shampoo available at most pet stores.
Tools & chemical:
cat shampoo or medicated flea shampoo, lots of towels and a friend to help.
Try bathing your cat in the kitchen sink, or if that doesn’t work, get right into the bathtub with your cat in your lap – be sure you are wearing long pants and sleeves if your cat is likely to claw you!
Note: A smelly cat or dog may indicate that your pet has a health problem. See your vet.