I have an englander epa wood furnace. I have no issues with creosote in my chimney. I clean it every year and get very little out but the cap gets really bad. It's like when hot hits cold air it condenses. I could clean the cap once a month. Is this normal? I've been burning wood for 8 years and I always get worried about the cap lighting off. Occasionally you will see an ember glowing on a windy night in the cap. Do I need a high wind cap or something to block the wind?