No, hair dryer works by taking ambient air and heating it before blowing it out. Besides, definitely don't want to heat up the phone. The aircon dries the air itself as part of the cooling. When using your windscreen vents you don't have to set the temperature to hot to clear the windscreen as long as that aircon compressor is running. People just do because when you need to defog your windscreen it's usually cold as fuck outside...
To dry the phone, set vent to windscreen, temperature to cold, and make sure the aircon indicator on. Cold, dry air.
While I was reading this comment, I thought it was a sarcastic parody of a promotion for the software...
Then as I kept reading I realised that the lines in italics are not parody, but actually from the company.
Fuck those guys!