I have a question I bought a brinkman charcoal smoker then I converted it to electric. I smoked a rack of ribs for about 6 hours and they came out very tough. They were over cooked but I couldent get my smoker above 205 degrees that is why I left them in so long. At 205 degree how long should I have left them in. And should my smoker be getting hotter? any help would be great thanks.