I second this!!

Purchased a salt and pepper shaker from Peugeot in 2019: Paris stainless steel 7-in.

Was hoping for a BIFL set but was immediately disappointed. The grinding burrs on the unit are nice but the top screw on the mills FREQUENTLY loosen as they are used. I need to tighten them almost every time they are used. I have tried to tighten them more and less, trying to find a tension where they are stable. No luck. I'd love to throw some thread lock on there but then I wouldn't be able to put the salt and pepper in.

Very annoying!