Does this work even if there is no heat in the car? I have cold air blowing but I was taught to only use hot air but my first car doesn’t have that right now…
I recently had no hot air and it was due to a fault in the cooling system, in my case it was the water pump and thermostat, you may want to get that checked out if you haven't already. I know I'm being really nosey right now but out of curiosity, is your engine heating up to temperature correctly or overheating at all? 😅