Quote Originally Posted by Mer_de^Vert
I have a manually operated one. I have trashed 3 discs but that was because there was some substance (not cum) on the surface and the wheel dragged the substance and made the whole thing worse.
That's what I thoght was happening to mine (also not cum), but I think it's something with the gears in it. It'll run fine, but every now and then a gear slips or something and it drags funny. After I've done a whole disk, about 3/4 of it is clear, but the last quarter of the surface looks like it was run over by a dump truck draggin metal pipes.