grimy

/ˈɡraɪmi/
adjective
  1. Covered with or full of dirt, soot, or grime; very dirty.
    • She wiped the grimy counter with a damp cloth, but it still looked stained.
    • After fixing the old car, his hands were grimy and black with oil.
    • The windows of the abandoned factory were so grimy that no light could get through.