Car Defogger Kit Special conductive material for convenient and quick of your car's heat filter heater gridlines. Costsaving DIY solution: the rear window heater grill wire at home instead of taking the car to a professional facility. Easy to use: suitable for both novices and professionals; straightforward to apply to your car's hot defroster heater grid lines. Practical professional tool: allows you to pinpoint and the exact point on your car's heat filter heater gridlines. Use scenarios When the rear window defogger shows weak or intermittent heat, use the kit to the damaged gridline and restore performance. If only a segment of the heater grid is damaged, perform a targeted at that point to avoid full replacement and reduce costs. During routine maintenance on an older vehicle, use the kit to extend the life of the rear defroster by repairing damaged gridlines rather than replacing components.