If trying a microfiber, first "scrub" only the smooth, shiny dead wax area of a pristine record that you don't care too much about. If cleaning swirls show up then the rag is not suitable for use. I have tried a couple of different ones and found they both were very rough on the vinyl, but this was a few years ago and the fibers may be different now.
re: carbon fiber brushes - they are not adequate alone, they "herd" the dirt really well to one location but cannot pick it all up, leaving a lot of micro-dust behind. If I use a carbon fiber, I follow it by a sweep with a damp old-school brush to remove the leftovers.
re: carbon fiber brushes - they are not adequate alone, they "herd" the dirt really well to one location but cannot pick it all up, leaving a lot of micro-dust behind. If I use a carbon fiber, I follow it by a sweep with a damp old-school brush to remove the leftovers.