I know this question may sound ridiculous!
In the past I bought a salt grinder from a shop near where I lived at the time and it worked perfectly for about ten years until the grinding mechanism eventually wore out. I no longer live near that shop, so can't buy another one the same.
I have bought two different salt grinders, and both of them clog up every few weeks (presumably as the salt absorbs moisture in the air) and become unusable. I then have to empty out the salt, wash the grinder and allow it to dry, refill it, only for it to clog up again a few weeks later. It's a real nuisance.
I am using the same salt as I used with the previous grinder, so the salt is not the problem. (I always use sea salt, which I prefer to rock salt.)
If anyone can recommend a grinder that doesn't clog up, that would be brilliant! :) Ideally a wooden one, as I like them!