Any pet shop will have special puppy shampoo, make sure the shampoo is well rinsed off and the puppy allowed to dry well. Wash in warm water, don't do it outside under a hose as its much too young. Keep clear of the eyes with the shampoo and a tip is to hold the puppy with your hand on its neck just behind the ears, this will stop it shaking all over you if the head gets wet. Hold a big towel over the puppy when you lift it out of the bath or tub, and let it shake into that so you don't get covered. Have fun.