I decided to freshen up the vents and purchased A/C Pro Vent & Duct Cleaner ($10)...others were 1/2 that price. This product is sprayed inside of the air intake, so i had to find where the in-cabin air filter. I found it fairly easily under the plastic cover on the passenger side of the frunck. But while i was removing the plastic cover, the one screw (holding the cover) into a grommet became striped. I was able to pull the cover off and ended up replacing the T25 screw/grommet with a Nissan "splash retainer"...it fit perfectly! I replaced both T25/grommets (driver and passenger side).
