De-Icing Spray and Lock De-Icer
A blog somewhere mentioned that a mixture of 2/3 vinegar and 1/3 water in a spray bottle will de-ice your car windows. They suggest spraying when you park the car in bad weather and when you park your car for the night at home. In the morning it should be easier to clear the ice.
Also a small bottle of hand sanitizer in your coat pocket can be used on locks and your key since it's 90% alcohol.
If you travel during the day with a back pack even a smaller spray bottle with the vinegar mix and a small scraper might help you get into your car easier.
There could be other applications for this in winter maybe like spraying the ice around your doors? Spraying anything frozen and stuck?
Makes sense to me. Could even make up small spray bottles and attach a small hand sanitizer with a note on this for stocking stuffers to spread the word.