Spray the odor eliminator into the vent 10 times. You may have to open the hood to get a better shot at the vent.
Enter your Oldsmobile Alero after a minute and wipe away any excess formula that is coming out of the vents.
Check the smells coming from the vents. If there are still odors, go back to the outside vent and spray the odor eliminator five more times.
Continue performing Steps 6 and 7 until there aren’t any odors in your Oldsmobile Alero. Then, change your vent control to air conditioning, set it on recirculation and close the windows. The re-circulation setting completely blocks any outside air from entering the vehicle.