Possibly because once your nozzles are frozen, you’ve left it too late! ;-)
Personally I would recommend steering clear of any supermarket stuff that’s only good to -5°C. Even stuff supposedly good to -10° can freeze on contact with a cold screen. I use stuff rated to -20° as my default in the colder months.
Tim
Not sure that idea ever occurred to me, heating the key with my cigarette lighter worked fine.
<snip>
The washer jets are in an area between the bottom of the screen and the rear edge of the bonnet. This whole area was filled with ice from melted and refrozen snow. So a washer jet, even a heated one, had no chance at all.
The engine compartment seems well insulated. There was still snow on the bonnet when we arrived home after about an hour's drive. So not a lot of chance of engine heat melting large accumulations of ice.
I have vague memories of cigar lighter tine fan heaters for allegedly defrosting windscreens but I don't recall any being effective.
Cordless hot air gun? Could use existing batteries if compatible.
Interesting challenge.
Cheers
Dave R
And... buy it before the cold weather sets in. It will have sold out by the time you need it.
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