Two towels. Tweezers or a flea comb. A mild cat shampoo. A plastic bag or a garbage bag.
Choose a quiet location where you can close the door. Keep some treats on hand to reward your kitten for behaving in the bath. Fill the tub, sink, or bowl with warm water. Make sure the water is cool enough that you can comfortably touch it with your bare hand.
You do not need to hold your kitten in the water for long. You only need to make sure all its fur is wet. This should only take a few seconds.
Apply the cat shampoo in gentle, massaging motions. Be very careful not to get the cat shampoo in your kitten’s eyes. You may see fleas run to your kitten’s head, as they go for the driest area. If you’re able, pick the fleas off as you see them moving. Drop them in a cup of hot water to kill them.
Dry your kitten off with a warm towel after its bath. Give it some treats to reward it for cooperating during a stressful experience.
Never use over-the-counter flea medication on newborn kittens.
Wash all your kitten’s toys and bedding in warm water. Steam clean furniture. Sweep and vacuum frequently.
Do not medicate your kitten without consulting a vet. Many flea medications have minimum weight requirements for safety.