I have noticed that sometimes when I am honing a razor. all of a sudden there is a grinding sound as if a piece of sand is under the razor. If I stop and wipe the razor and the stone it stops ,but if I keep honing it makes a scraping sound as if there is a large peice of grit or metal shaving on the stone. I can't see anything but it goes away when I clean both. Has anyone else noticed this? Mack