I've shut down the EKO 40 for the year and when I pulled off the front cover for the fan, this is what I found. I did have a smoke problem on windy days this year, but no more than normal. I've never had this problem before (this is the 5th year I've been using the boiler). Would this be solved by a whirlybird cap to stop downdrafts, or is there something more serious at work? Btw, how would I remove the fan to clean the creosote out of it?