Yup! If the bark doesn't fall off, it gets burned. Good to know, that the bark was most of the problem. I might have to cut up some cotton wood next year and verify this. The cotton woods around here become monster trees before they find their way to the ground. And now that I have my splitter that will go a long way in processing them for heat. Until they are fully seasoned, with all that moisture, they are almost as tough as a truck tire to split by hand.
I cut parts of one way back in the 80s. Would NOT split at all, splitter just "mashed" its way through. Figured 'stack rounds and let dry a year' Nope, same problem. After 2 years I finally cut the 16" rounds into 8". Sorta split then but mostly just mashing it's way through. Swore I would never cut another one. I don't know which species of cottonwood that ws.