They are definitely well built. I have two. A work one and a “going out “ one. My they are both about 4 years old. I use my work knife everyday. It’s held up extremely well. I’ve done zero “factory maintenance “I still don't get it. Are these things really that good? Is the quality insanely high or something? To me, they look like something you'd buy at a gas station. Sorry, but truth.
I use an air can to blow it out and a few drops of oil occasionally.