I had put my Proraso soap into my Old Spice mug. I figured being out in the open air wouldn't hurt it. It turns out that this soap really should be kept in a covered container, like the one it came in. I guess Proraso soap isn't so much of a soft soap as a hard cream. The soap hasn't gone rancid or anything like that, but even with daily use it continues to dry out. While the soap still lathers fine, loading the brush sufficiently to have enough lather for three passes has become increasingly difficult. I used to be able to load for 20 to 25 seconds and I was set. Now, even 30 or 35 seconds still leaves me with almost no lather in the brush after two passes. I'm going to put the soap back in its original container with a little water and see if I can re-hydrate it.
Lesson learned.
Lesson learned.