Okay, it looks bad, but don't give up. Try some good detergent and a nice long delicate cycle. You may get lucky and get a few more uses out of that rag.
Good luck!
(Sorry, couldn't resist )
I used to be "Chubs". Sorry I've been away for so long! I got married and am now "Hubbs"!
Garage:
1970 Dodge Challenger 440/4sp
2013 Dodge Charger SRT-8
2014 Ram 1500
2015 SRT Challenger Hellcat (on order)