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      01-25-2013, 01:48 PM   #22
fullboost
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Drives: '11 M3 DCT
Join Date: Jan 2011
Location: SD, CA

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I had this problem on a few cars about 10 or 12 years ago but I found a way to prevent it happening. About 2 minutes before you arrive to your location turn the AC off but leave the fan blowing. The AC ducts and vents will warm up enough so that condensation won't build up thus not able to create mildew. Have had a smelly AC since I've started doing this.