1. Start bathing your dog regularly at a young age to get him used to the process. But remember, puppies should be at least four weeks old before they receive their first bath.
2. Before starting an indoor bath, make sure the house is warm. Turn up the thermostat a few degrees if necessary. Do your prep work and have everything ready ahead of time; you don't want to be scrambling for shampoo or a towel while you're trying to wash the dog.
3. Start by combing and brushing out all mats. Otherwise, the water will turn the mats into solid masses, which will require clippers to remove. If your dog's hair is matted with paint, tar or some other sticky material, trim with clippers or soak the area with vegetable or mineral oil for 24 hours. (Consult a professional groomer for especially difficult tangles.)
4. Prep your dog. Put a drop of mineral oil in the eyes to protect them from suds. Some people use cotton balls in the ears. If you use cotton balls, make sure they're the right size for your dog's ears; if they're too small, they may slip down the ear canal. Be very gentle with your dog's delicate ears and don't push the cotton down further than can be easily retrieved.
(If you don't dry him, he will "shake off" all the water on you, your house or anything nearby!)