I have never used it and when it comes to investing money into tweeks sometimes you need to use common sense. I did a search on this one and here are some links with information for you to decide- at $20 pr sheet I guess it might not hurt too much to try huh?
http://www.stereotimes.com/acc030903a.shtml
http://www.tnt-audio.com/accessories/ers_cloth_e.html
http://www.stereotimes.com/acc030903a.shtml
http://www.tnt-audio.com/accessories/ers_cloth_e.html