P.S....I just took it out of the pot for a look and the roots are fine. The soil is not wet, kinda moist. Smells like dirt, earth. No bad smell.

Sometimes that happens. If those spots on the top leaf are dry I wouldn't worry about it. If that bottom leaf is mushy I would cut it off if it were mine.

Katrina, leaves die. I lose Sans leaves at time….just an old leaf, five or six new pups have sprung up over the last couple of years, and an old leaf dies. Cut it away; it will look better and it won't use plant energy. If your roots look good, that's the important thing.

The top leaf looks like damage of some sort, the bottom leaf. looks more like a fungal infection. Unfortunately fungal infections are contagious and there is no easy treatment for them. Get it out of the glazed pot and check the roots. Surgery may be in order.

Off with the leaf then. I love my little guys and panicked when I saw that. I immediately pulled it out the pot and checked the roots. I justI just knew it was the dreaded root rot. All of my "work snakes" will get soil changes to the CS/Perlite mixture over this week. I'll perform its surgery then. Thanks for your help friends.