the main problem with the reservoir heater is that it only heats the fluid in the reservoir. it isn't going to thaw the fluid that is frozen in the lines and the nozzles.Pappy wrote:I would be curious about how the washer bottle warmer works. Only when the vehicle is running? Not very good if that is the case. We have just come out of a record low temperature December for here in Fort McMurray Canada. I have seen it at -45F. Right now with the sun out, the temp is -29F. I purchase washer fluid that is guaranteed to be fluid at -45F and I can say that it actually works. Can't remember the brand, just saw the claim on the label at the gas station and filled it up. The station was a Perto-Canada unit if that helps but I don't think the brand was their in-house juice.