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comment How much isopropyl alchcol to deodorize AC ducts?
@BertrandCaron It was difficult to use an old Windex bottle to spray stuff through the tiny vent openings below the windshield. I didn't remove the cabin air filter. But after recently replacing my blower motor, and seeing a lot more of how things move, i would take out the filter, and spray directly into the place where the filter does - directly into the fan blower. But i sprayed as much as i could stand; about a quarter of a windex bottle.