What do you mean you have to change those air filters thingys?

This is what a 6 year old air filter looks like.  It's a good quality air filter, but they don't last 6 years honey.  Pretty gross, and sad to know that the previous home owner's thought their a/c was broken and went all spring/summer without a/c.  They had two window units, but this past summer was cookin' and if they would've changed the filter, this would have been solved.  One small project at a time....