Just wanted to update. I took the knife apart today to see if I could fit some orange paracord as a lanyard, but when I ties it up it was too thin so I went back to the melted cord in the lanyard tube. Anyways, I took the knife apart and thoroughly cleaned it. Detent ball, around the ball and all other parts. This time however, I polished the washers well with some NOXON metal polish, then thoroughly cleaned the washer and inside the perforations. Reassembled as usual and the knife feels totally different. Also, normally after 10 quick back and forth openings, the knife feels like metal on metal pitting/galling, but now it's a nice smooth fluid (literally) movement. Very nice, never felt it before. I believe the washers being as tarnished as they were, would spin after opening and closing multiple times, turning into a certain area causing the gritty feeling. Hopefully problem solved!