Before spending on a different cart, try cleaning your record. There are several good cleaning systems that you can use on your turntable without spending of a cleaning machine. DiscDoctor makes such a product.
Second, clean your stylus. That’s easy and inexpensive. (See Soundsmith site for instructions.)
Since you’re using a MM cartridge, I can’t make any suggestions in that area except to consider acquiring a phono stage that can handle BOTH MM and MC cartridges to give you more flexibility in cartridge selection.