well now, it's kinda early in the morning to be thinking too hard.LOL. Sometimes the line will build up if holding reel to one side and then the other. If replacing the worm gear and pawl works, then change them.
to inspect the pawl, hold up and look at the side of the half moon, if scratches, get you a new one. To check your worm gear, use a cotton swab and rub up and down the gear while turning, if snag, get a new one.
Visually inspect the gear by looking for scratches on the tips of the gear teeth. The pawl travels back and forth between the teeth on the worm gearshaft as the handle is turned. If the pawl does not travel the entire distance, build up will happen too.
When putting on your line, be sure to load line straight accross and back and forth. I know I've loaded line and not had reel level and had build up on one side. Don't know how I could make an error. Hubby says it is just amazing.
Alol of the advice here is great. someone mentioned mileage on a reel. IMHO! It is the care you give your reel, just like your pickum up truck, the better care, the longer it lasts. conniek