Caught lots of big fish on my G1 SX the past few years. Never serviced. Noticed recently that the freespool is loosing its free-ness. How can you tell if you need new bearings or just more oil? Not seeing any corrosion on the bearings. Just some corrosion on the inside of the MC mechanism on the inside of the left sideplate and some salt in the grease on the left sideplate. Thanks!