prior to starting any vehicle to make sure all a/c's are in the off position. so i applied this to my own vehicles and took it a step further and would do exactly as a.rosich said and turn off my a/c 5mins before to get the moisture out of the system.i never get the bad smell when i return and use my a/c.it's good to know that there is a side benefit in taking care of the evap.as an extension of this REGARDLESS of where you live,it would be a good idea to run some heat through the hvac system to keep everyhting 'lubricated'

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'95 s500 (bought for wife but can't bear to share!!!) 125kms
'92 legend 180kms
'88 tbirdturbo(fantastic car-only regular maint.)120kms
'87 mustang gt(gone)
'86 tbirdturbo(gone)
'85 mustang gt(gone-but not forgotten)