Doubt it would do damage. What you may be noticing is reduction of static electicity on the LP. I think those clothes work mainly on the basis of attracting dirt with a static charge.
Anyone use a Pledge "Grab-it" on their vinyl?
Yeah, it may sound strange, however, it seems to work really well before using a carbon fiber brush. It seems to remove that last bit of "snap, crackle, pop" from the vinyl.
Any thoughts?