Answer: smudges

AnswerCrossword Clue
SMUDGESSmears
SMUDGESDark marks
SMUDGESFingerprints, often
SMUDGESPrinting problems
SMUDGESBlurry patches
SMUDGESSmoky fires for driving away mosquitoes.
SMUDGESUnusable fingerprints
smudgesSMUDGE, to smear (to spread with something oily or sticky)
smudgesA blurred or smeared mark on the surface of something
smudgesAn indistinct or blurred view or image