I considered this when I started using the Dremel years ago with the cheap unreinforced wheels and for the RD end cut I would install a cable near the cut and right after when the liner is still warm I shove the cable through, thinking it will remove any debris. Being a now retired ex-maintenance engineer when I change the families housing/cables (or any parts) I always look things over carefully as I have the time and see no indication of embedded grit impact on liners at the stops. I now use the Dremel 506CU cutting wheel which Dremel claims to last more than 20x longer with very fancy grit and admit it is not showing any wear to date and it may actually be cutting cooler so don't worry about a grit issue if there ever was one.