Unplug the dryer for safety purposes. Let the dryer’s drum thoroughly cool if it is hot.
Squirt 1/4 teaspoon of liquid dish soap into a 1-quart bowl. Fill the bowl with warm water.
Stir the solution until the soapsuds are evenly dispersed throughout.
Dampen a rag in the solution. Wring any excess solution from the rag. Wipe the dryer’s drum to clean off the jean dye.
Continue wiping the dryer’s drum with the solution until no more blue dye transfers onto the rag.
Moisten a fresh rag with water. Wipe the dryer’s drum to rinse off the soapy residue.
Leave the dryer’s door ajar to permit the drum to air-dry. Plug in the dryer once it’s dry.