Islamic Interpretation of Dreams (Ibn-i Sirin):

(Dirt) Dirty hair, a soiled garment, or a filthy body in a dream mean distress and worries. Dirty clothing in a dream mean sins.

If the dirt comprises oil or grease in the dream, it means attachment to mundane and material objects. Washing one’s clothe in a dream means repenting from sin and washing them away. Cleaning off the wax in one’s ears in a dream means hearing pleasing words.

(Also see Cloth; Dirty face; Garment)