I have a Makita ROS that uses hook & loop to attach the paper to the sander. Most sanding disks stick to it like contact cement. But ever now and then a disk won't stick to it at all. I was thinking that it must be the cheap disks I've been buying, so I ordered some Klingspor disks. So far these disks stay on the sander for a while and then all of sudden the disk just flies off across the room. Is there something wrong with my sander or is this the way they let you know it's time to change the disk? There "piles" like you would see on old worn out flannel pajamas on the disks that won't stick.
Also, I seem to need to change grits before the disk wears out and when I reuse these disks, they seem to not stick as well as before and some won't stick at all when I try to reuse them. I thought disk reuse was one of the big advantages to hook & loop.
Comments please.

Larry