I clean my stylus with a little block of Magic Eraser after every play and there is a definite accumulation of tiny black vinyl particles soiling the white Magic Eraser after a few dozen plays. LPs are always spotless and cleaned with two vacuuming steps (cleaner and pure H2O rinse.) I have no doubt that set up parameters are spot on. I think it's normal for some constant debris to be kicked up from the grooves in spite of attention to cleanliness and setup. Otherwise, why would we need to clean the stylus in the first place? If someone is a complete slob about record hygiene and plays uncleaned used lps, I don't have too much of a hard time imagining a buildup of compacted crud after a few hundred hours. After all, the immediate point of contact between the stylus and lp surface is subject to immense heat and pressure (albeit very briefly.)