My fan was clean of debris. But the blades were filthy with grease and dirt. I ended using some tools from my gun cleaning kit to clean out the blades. Also, while I was in there I reached into the evaporator and cleaned out a bunch of nasty crap in there. Couldn't fit my had too far down, but far enough to get out the junk. And this is after I used the BG Frigi-Clean treatment on the evaporator the night before. I also sprayed some Lysol into the evaporator for good measure.