The de icing was for a couple of things, He was called into work that morning and came home before I left for work. Then he ran a couple of errands and I figured he should just sit back and enjoy his afternoon. He said he went to heat the car up and he was also de icing it....I noticed I was running a tad late and tried helping him do it...and we argued over who was doing it right....Then there were spots missed....it wouldn't have saved time because I got caught in traffic on the way to work.