Hi everyone. First post here. I just upgraded to a Jotul F45. It's raining here today in Mass. I got out of work and started a fire to finish my last break in and get the chill out of the house. I noticed in the first 10 minutes the inside if the box was sweating in the rear and the front where the steel was. Is this common? Or just right variables right now? My last stove was cast and never noticed.