Look at the clutch cable at the handlebar end, my original cable frayed right at the swaged cable end .
No clue it was going bad, left home everything was fine , about 2 miles from home , the clutch started acting odd, pulled over found the cable was not going back into the sheath/conduit properly .
You can lube the cables if you want, I've been doing it, I use a cleaner, like isopropyl alcohol to clean it out, if you use some harsh or strong cleaning chemical, it may harm the teflon lining, then I use a common cable lube, I think I have PJ1 cable lube .