I have used a puck of Tabac for about a couple of years or so now in my rotation, with about 20% of the puck left. Just recently, I can not generate a good lather any longer from the puck. The puck is now on the squishy side, could this be from letting some hot water sit on the puck during my showers over time? I pour off the excess water after scrubbing it with my brush. Has anybody else experienced this?