YouTube has some EXCELLENT video on both "level wind" and "spinning" reel maintenance.

I've been doing my own for 50+ years, most of my level wind are Curado's or Ambassadeur.....which are simple to work on. All my spinning reels are Shimano Stradic or Pflueger. Spinning reel are easy to work on!!!
_________________________
"Worse day sport fishing, still better than the best day working"

"I thought growing older, would take longer"