If the truth be known, the FRN Spyderco knives are about as close to maintenance-free as you can find in a folding knife.
It's like the AK-47 of the knife-world.
While I do baby my Endura abit, my wife never cleans her Delica. She wears it nearly everyday or throws it in her purse (the black hole of Carolina) and hardly ever cleans the blade (even after cutting tape or other sticky stuff).
I clean it up for her about once every three months, and I'm amazed that it usually is still "working sharp" and functions just fine.
It really is fairly maintenance-free.
Good luck,
Allen.