I got my first razor last week and have shaved with it about 4 times. When I took it out today it had two dark spots about 1/8 inch from the pivot and a spot on the tow end of the spine. I tried wipping them off with a piece of tp but they would't come out. I automaticaly jumped to pitting but I have only had it for a week and there hasnt been any rust and I dry it realy well. What could it be?