My wife's Turbo Creo makes a squeak every time she moves it. When she brought it into the shop where she got it for its 90 day checkup, it came back fixed, but with no explanation (this is partly b/c of their covid procedures, and partly their unfortunate procedures--even pre-covid, I've only been able to talk to the person who actually did the work 1/2 the time). So I need to fix it myself. I think the issue is the flat plate that is attached to the stem moving against the corresponding part on the head tube. I'm guessing it just needs a bit of lube, but it seems like a design defect if it needs to be lubed every 2-3 months. Has anyone else had this issue, and a better fix?