You do realize you just essentially pissed in your air conditioner/heater, right? On many cars, the intakes for the cabin air system is at the base of the windshield...I dunno about brew day, but there has been a few COLD mornings when I head out to work and don't have time to scrape the ice off the windshield...found an empty cup in the bed...filled her up and used to de-ice!