Answer: defogger

AnswerCrossword Clue
DEFOGGERWindshield-clearing aid
DEFOGGERWindshield clearer
DEFOGGERWindshield cleaner
DEFOGGERVisibility aid
defoggerA device on a vehicle that removes condensation from the windshield by directing a jet of air onto it
defoggerone that defogs (to remove fog from)