Anyone have experience with "anti fog" windshield products? Last week we got a good batch of snow, and the day after I scraped my Blazer clear and drove to the store. When I walked back after shopping I noticed it was completely fogged up. I started the engine, with defroster on full, and put away the groceries. I waited a good 10 mins in the parking lot and the windshield wouldn't clear. Not even close. I noticed the interior was actually coated in ice. I scraped the ice but the fog just wouldn't clear.
The store is less than a mile away so I managed to get home even with a clogged up windshield, but I'm wondering now if a fog repellent product would help or if I'm wasting my time?

@ the boy at :40.
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