Hadn't changed my cabin filter for about a year.. it needed it lol...Looks like a mouse with a sweet tooth had been visiting at one point.
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Three years! One year max for mine and more like 7-8 months. No charcoal versions. Every one I tried restricted the airflow too much. We all do whatever works for us. And yea, you're right. That is nasty. LOLThat is nasty. Ours didn't look anywhere near that bad after almost three years.
Montana, but have been on a lot road trips...Dang!!!! That IS filthy!!!!
Where do you live, New Mexico?