I have some green moss growing up a large portion of the trunk. I have a lot of corky trunk material, so what's the best way to get it off without removing all the cork too in the process? The cork comes off pretty easily, and I'm worried if the moss stays on too long it'll rot the corky bark. I heard that I can use vinegar and brush it on the moss, wait a day, and it should come off easier once it's dead? Any thoughts?