I have a pickup that was a rollover that I overhauled, its back window was smashed out and the guard dogs made it their home in the impound yard for about a week in the winter, I properly cleaned/shampooed aired out the interior, as well as tried various odor removal techniques (several times) and it appears spotless but there is still a lingering odor. I have heard of people placing charcoal in the interior and it supposed to absorb the smells, has anyone tried this? I dont want to waste my time with old wives tales that dont work (like a bowl of vinegar which made the cab smell of... vinegar on top of the previous smell.)