My puck is not on regular rotation and it got very dry. I think I even let the lid off one time. One day I tried to use it with poor results. I am a big fan of MWF but Castle Forbes was discovered. Anyway, I decided to see if rehydration would work and left the puck soaking in water over night. I think it worked. So basically if you get a decent lather the puck is hydrated but if you are not it is possible that the puck has dried out too much. Of course there are other variables to consider but I think this is another with an easy fix.