I second Jmcgrogan's suggestion. I've rehabbed over a dozen "broken" or "worn out" cartridges just by cleaning the stylus properly. The Magic Eraser is the best method for 90% of such cases I've found since I first wrote about it on this forum. In rare cases, stuck-on gunk needs more vigorous cleaning. A sliver of ultra-fine sandpaper will remove most anything that the ME won't.
By all means check your setup, but clean the stylus thoroughly first. Shine a light through the stylus and look at it with a magnifier. If the diamond is anything but brilliantly clear, it needs cleaning.
By all means check your setup, but clean the stylus thoroughly first. Shine a light through the stylus and look at it with a magnifier. If the diamond is anything but brilliantly clear, it needs cleaning.