How does a dragon get clean?

Dragons, often depicted in mythology and fantasy, might get clean by bathing in large bodies of water, such as rivers or lakes, where they can splash and scrub their scales. They could also use magical means, like enchanted waters or spells, to cleanse themselves. Additionally, some tales suggest that they might roll in the dirt or use natural elements like ash or sand to help shed debris from their bodies. Ultimately, the specifics can vary widely depending on the dragon's lore.