Has anybody burned mulberry? I got a medium size mulberry that's been down for 2 yrs. from a yard near where I work. I split it 3 mos. ago and it was dry as a bone. It doesn't burn very well or throw a lot of heat. I've had to throw locust in with it to keep the stove up to temp. Has anyone else had this problem or is it just me? It's hard to turn down free wood but I guess I'll pass on it next time.