If adjusting, remember that it moves opposite how you want it to sit. As in, to get the hood to sit down a tiny bit, you don't move the hinge down a tiny bit, you lift it, allows the hood to drop further due to the ratio movement. If that doesn't work, try the opposite!
Worn out is often when a hood can lift slightly after already being down, or can be pushed down a little by hand when sticking up. Can also be a sign there's more adjustment room. When hood is open, keep an eye on any twist, or new wear areas being polished.