Kamenstein Borosilicate Glass Grinder

The design is excellent for a modern, informal and convenient salt/pepper mill such as on a kitchen table. It can also be used for kitchen purposes, but the relatively small salt container might make that impractical. A nice surprise was the full amount of peppercorns sealed in the mill. They were still fresh when we tested them. There are, however, a couple of details that are in the way. First, the frosted glass area is quite large (probably to provide a handhold on the rough glass surface) and provides a large volume for peppercorns. But the glass has some white marks/abrasions(?) in a ring just above the silver plastic portion (see picture). Wiping them with water (which makes the frosted glass more transparent) seems to make them go away, and we hope they don't return. Also, the frosted glass tends to pick up moisture and oils when handled. These might be removable with glass cleaner, but it's a little unreasonable to have to clean the glass after each use. And while the plastic compartment at the top for salt is removable (and so allows for cleaning it as well as the glass part), it is rather small and so might need frequent refilling. Last, the grinder part appears to contain no metal, which would avoid corrosion, but we wonder how long plastic grinder parts will last.