So far so good. I've used a few other random products that seem to last much longer but are less effective. In terms of effectiveness they are strong, it seems true that they not only freshen up the car but actually eliminate / suppress odors. The little intensity control lever/vent has no real off position, even when fully closed it's basically strong enough. Very open, VERY tight. It's like someone doused you and the car with half a bottle of Fabrice, pretty strong. Not exactly a complaint as the flavors are quite good but subtle and controlled. It's not like this. Even with the car fans on.
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