I had awesome results with woolite and sandpaper..
I was so skeptical of this, when i bought my car my suede/Alcantra material was looking horrible, natted up balls of fuzz and grimey looking on the two front seats..
I used 800 grit sand paper, then went to 1000.. sprayed the whole seat down with diluted woolite, my seats look almost brand new again, I thought for sure my seats would never look good..
Can't remember where I first read about the sandpaper thing but i wish i could thank the guy!