So my car has been garaged (unheated) since a bit before travelling for about a week and it's been -10 to -15 degrees here the whole time. Car started like a champ. no hesitation whatsoever. BUT my washers no longer work. Neither my headlight washers nor my windshield washers will spray anything. Nozzels are heated iirc and i know they aren't clogged or frozen over, the stuff i just added to the reservoir is rated to -33. Not sure what was in it before. pump is pumping. Safe bet is the unknown-type fluid in the lines somewhere between is frozen, right? How long should i let my car sit and idle for that to sort itself out or start to look for another problem? a spirited 20 minute drive today did not do the trick.