Winter generally heralds the time of frosted and iced-over windshields, and people deal with this problem in various ways. There are some whose cars already have defrosting technology: for instance, some of Ford’s cars have something the auto maker calls “Quickclear”, a defrosting system engineered into the windshield during production. However, for the vast majority of people who have no such defrosting mechanism in their cars, other tools have to be used—tools that, all too often, lead to the need for windshield replacement.
The problem is that some people use overly tough or sharp materials to defrost their windshields. It might seem fairly normal to use something such as a credit card to defrost your windshield for some people, but there are also numerous accounts of items such as stiletto heels and even hammers (unbelievable though it sounds) being used. Obviously, these are potentially dangerous materials to be using on a frosted-over windshield, and the chances of cracking a windshield beyond repair goes up when they come into play. In the case of the hammer, one might even say the windshield replacement is already a given.
Warming a windshield with hot water is not advisable either, as the sharp temperature variance between the cold windshield and the water can lead to cracks (of which you might not even be aware) propagating across the surface of the windshield. If you already have a defroster mechanism for your car, you can just use that. Otherwise, you can try following the guide below.
First, you should get an ice scraper. This is the sort of purchase people who own cars and live in cold climates should simply make: an average scraper does not even cost that much, after all, and is often below the ten dollar mark. You can use this to scrape away the ice from the auto glass, first of all, and do it for both the exterior and interior surfaces of the glass. You can have a rag on hand when scraping the interior because it may drip on your dashboard or seats if you are not careful. If the frost on the inside of the vehicle is very thin, you can do away with the scraper for this part and just use a chamois sponge.
Finally, spray the outside of your vehicle with some windshield de-icer formula. This can be purchased at your local hardware or automobile store. Follow the instructions on the label of the de-icer and you should have a defrosted windshield in no time. Take note that you should not warm up the formula or combine it with hot water prior to use, or you shall end up risking a windshield replacement yet again.