Bad smell from AC - 2005 Nissan Maxima

bad smell when i turn my ac or heat on even with new air and cabin filter

There is a product you can spray into the duct work of your car.It is suppose to neutralize the smell.Forgot the name.Sometimes the blower motor needs to be remove and the squirrel cage clean with multi-purpose cleaner like Lysol.While the blower is out,reach in there with a rag saturated with Lysol to clean the upper part of the duct work.