I'm still using some Paterson reels I purchased 30 yrs ago. They've yellowed a bit but work fine. The trick, IMO, is continuous but simple maintenance. After each dev session, I draw warm water into the kitchen sink and add just a little dish detergent. I let the reels soak for awhile, swish them around a bit in the water, rinse them thoroughly in warm water, shake them vigorously to remove excess water, then let them dry in the dish rack overnight. Seems to work.
Gene