|The burrs of the Vario grinder|
If you seek excellent ground coffee or just a grinder that will last a bit longer - you might want to clean your grinder. There is a couple of different ways of doing so and because I have a European Vario (Mahlköning), which is the same as the American Vario (Baratza), I will link to some videos, which is describing the right cleaning method.
Seattle Coffee Gear shows us how to clean your Vario using a brush, which is the most cheap way of cleaning your grinder, but does´t remove all excess coffee oils from the grinder and therefore is this method, not the best possible.
Barista Lab shows how to clean your Vario using Urnex Grindz, which is in my opinion the best way to remove all excess coffee oils and grounds - but it will cost a bit more than a brush.