Ok...I saw one of these for sale in a catalog and figured they would end up doing more damage than good. This only heats up your washer fluid, and to the best of my knowledge you can not just spray your washer fluid without your wipers activating. You can spray your 'hot' fluid but then your wipers 'scratch' across all the snow and ice destroying the blades, until it actually melts. If you could spray w/o the wipe it would be great.