The slightest amount of dust, dragged around by a worn stylus will wear the groove quickly. A good record cleaner is a worthy investment. Poly lined sleeves to replace the cheap paper ones. A carbon fibre brush to lift surface dust before each play. And don't forget to replace a worn stylus every 500 hours.
Audio connections are a source of slow degradation.
This product removes oxidation and protects connections from further oxidation. For terminals and connectors we reccomend the Pen style applicator. It lasts nearly forever and won't spill or spray all over.