Whenever it gets really cold I cannot open the doors on my Audi. I thought it was because it was locked but even leaving it unlocked it still won't open. My son tried a hairdryer tonight but couldn't get the doors open.

My garage door is not working so I cannot put the car in the garage until I get that fixed and right now there is no money to hire anyone.

So is there a spray I can use to prevent this or some way I can convince my car to let me in? It is not a big deal usually but if my son or I have a doctor/dentist appt it is bad.

HELP!