You can clean the bearded dragon’s back, limbs, and tail by pouring water over it. Just make sure not to pour any water over their head, as some could get into its airway and cause respiratory issues.
You don’t need to use any soap. Although the bath will work to clean the bearded dragon, these baths are mostly a chance for them to shed skin and drink water. You don’t want there to be any chemicals in the water that would irritate their skin or digestive tract.
As previously stated, bearded dragons will often defecate into the water while bathing. When this happens, take your dragon out of its bath immediately, clean the bathtub, and change the water.