Babies generally start teething from 4-12 months. Some start earlier than others, some start late. Some start with one or two, some start with several at once. Either one, its best to start cleaning your child’s mouth even before her teeth come in. Wipe the gums off after each feeding with a warm, wet washcloth or a dampened piece of gauze wrapped around your finger. You can also buy thimble-like, soft rubbery devices called teethers; (they fit over your index finger) to use for rubbing off excess food.