If you love your razor, you will want to be able to care for it yourself. This also includes sharpening it on the whetstone. The edge slowly becomes rounded due to regular stropping. This is intentional up to a certain point. However, at some point the angle of the edge becomes too steep and has to be ground flat again using a whetstone. Grinding also becomes necessary if the edge was damaged due to unintentional bumping, falls, or rust due to improper storage. We have compiled a small guideline for stones and sharpening.