Get some of this to remove the current moisture in your car. every couple of days change it if it has absorbed moisture. If after a month you still have condensation you may have a leak. If you live in a dry climate with very little rain you may not notice it as much. I had the same problem with a Carrera and it ended up being that on the last detailing job they had a new kid doing it and he did not let the car dry out with the windows open.
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