In all my years of owning and driving cars, I had never heard of a cabin filter.

A friend of mine who works for an oil company does my oil changes. At the last one I asked him about a problem I had with the inside of my windshield getting a light film on it that needed to be cleaned with Windex etc and was very hard to clean.

He mentioned a cabin filter and told me to check my owner's manual.

Well, there it was - behind the glove compartment. It had been in there since 2008, when the car was new. Needless to say it was packed with dust, bits of grass, seed and whatever else was in the air.

I could not believe the increase in air flow when I replaced it!

Just something to check if you did not know about this item.