Sharpen the blades, clean out the pocket lint and maybe a bit of 3-in-1 oil when things are getting too gummed up.
I’ve had my knife for several decades. I did end up getting it replaced once under warranty early on. But, I blame my taking zero care of it and carrying it up sand dunes on a yearly basis. The sand really jammed up the blades.
I’m also going to replace the scales “soon”^TM^. Said replacement having been planned as “soon” for the last few years. Ya, ya, I’ll get to it.