I read about a device that can be added to cars to prevent mildew from growing on the evaporator thus causing the dreaded AC stink. Some cars, I'm told, will run the blower fan for a few minutes after turning the car off if the AC compressor has been on for a long time. A "Car care" book from Popular Mechanics mentioned that there are aftermarket versions of this than can be added to any car. I can't find any reference to them on-line. Does anyone have one or know anything about them? BTW, I understand how easy it should be to turn off the compressor a couple of blocks from home. I really do understand this. Thanks.