There are a few things you can do to clean yourself in RDR2. First, you can use the bathroom. Second, you can use the kitchen. Third, you can use the forest. Fourth, you can use the castle. Fifth, you can use the mine. Sixth, you can use the swamp. Seventh, you can use the river. Eighth, and lastly, you can use your sword and shield to protect yourself from monsters and bandits.