I know he mentioned thymol...I believe that's how it's spelled, was in listerine. I wasn't sure I could actually use the listerine so that's good to know. Easily purchased. I will make a note for the bulletin board of your mix and do that as well.
I realized after my last post that it can't really be the house and it's probably my mismanagement of the leather coupled with poor storage practices....I had it too cramped together and should have cleaned up better after handling a piece with mold on it. I say that because I have about a 100 straps hanging on the wall together, some dyed, some not and none of that has any. Also my big rolls of veg tanned, undyed which should have it from being rolled up if it was a moisture issue in the house, doesn't have so much as a tiny spot on any of it.
As I said in my first post I make journals most with a long leather tie around them as a closure and the ties on a number were getting bad were they met. I had them standing up side by side on a bookshelf so it probably spread from being in such close proximity. So I wonder, how do you guys store your finished products while they are waiting to be sold. I sell online so I may have books a few months. Some go fast, others sit a while. 30 books or so books lined up touching each other, leather wrap covers and more leather wrapped as closures seems like a breeding ground for this kind of problem. Wonder I did't have a worse problem than I did. Do I plastic bag each one first with a silica packet or two in the bag?