Has anyone ever run into a problem burning skids? I hear they may sometimes be treated chemically for insects or what-not. Especially if they come from another country. I have a large supply at work, a lot of hardwood, too, but have been hesitant to use it indoors. I do know that some of our stuff comes from other places. One time I found paperwork in Russian between 2 sheets of aluminum. But it would be good for the shoulder season........