I've used that lock de-icer before and it didn't seem to really work. I used it when it was cold but not that cold and it did but last year when it was like -20 for a month it didn't work at all.
Champagne 1995 Ford Contour LX R.I.P. - 7/11/06
V6 2.5L 24v DOHC
Oversized System
