Oh my god dude...I did not take it to the car wash but I have a detachable shower head...
So anyway..first freaky thing...It just started clogging after it made a funny noise this past week. A HUGE shield bug came out of it half dead when I flipped it around so the water could drain. It was over and inch long and then it started draining better.
IMAGE: Wikipedia
But since I had the whole unit out I sprayed it anyway. I had done it while in the window with just a spray bottle and hot water...
But I sprayed diluted 409 on it and let it sit a few minutes and then really rinsed it out the shower...CHUNKS! They just came pouring out and it was soot-like (I live in a city). I thought some stuff would come out but..Good LORD! LOL
Double bonus is that I took the whole thing out (casing and all) and was able to slide it to one side just a little more while still being on the platform and now the unit upstairs does not hit it at all. ☺
It is running way better and sounds so much better. I had no idea it could get this dirty but I never had a window unit in a city before. Only small towns with cleaner air.
But being this is a huge unit that requires two people to lift it.. I am very glad this will only be an issue every couple years! LOL