There is a relatively unpleasant smell in my car's HVAC, AC or heating system.
Failed idea#1: I removed the cabin air filter and sprayed lots of Lysol in there. It did not help much.
Failed idea#2: I asked my mechanic and dealer if they can open the HVAC/AC and clean it. It seems that it is 2-3 days job and costs ~2000$. Not an efficient option.
Idea#3: There are sprays that guarantee to eliminate mold smell from the car AC system; however, I guess it just hides the odor, and I am not sure it removes the actual mold or bacteria.
Idea#4: I am thinking to spray 3% oxygen peroxide (or alcohol) there, but not sure if this idea causes any damage to the system. Should I do this?
Is there any car HVAC/AC cleaning solution or technique that helps with cleaning the HVAC system?
Update1 The car is Camry 2007. Everything other than AC odor is in a decent shape.