Wellllll,,,,,,
I had a small plant that had rotted most of the caudex. I didn't have time for fooling with it. Hung it out on the fence, didn't cut anything. The rotted part dried up in a few days, and the top part healed at the edgeg of the rot. I was amazed. I have another little plant doing the same thing.
I have un-potted several large plants, say three years old, as well as the huge plants that I dug from my friend's yard, and found healed rot!
.
If I find rot in the future, I'm simply going to wash ALL the soil off the roots and hang. No tedious anything, even no cinnamon.
