A/C will work better by it self. crack the rear windws (if its a 4door) or the pass window only (if its a 2 door) and turn on the A/C full blast wit the defrost mode on and it will be gone in secs.

Problem is you have to keep the A/C goign till the temp sets the same oor it will fog righ tback up when you turn it off.. I like to just turn the fan on and let the cold air from outside do the work and save gas from runnign the A/C.