I'm pretty new to smoking and have a question. I have a vertical water smoker and use a mix of lump charcoal and wood chunks. Last weekend I monitored my temp very closely and it was at about 230-240 the whole time, however my ribs reached internal done temp well before most people say it should reach that temp ( 2 hours). Should I lower the temp a little? Also they were a little tough. when the internal temp has reached doneness should i leave them on or do I have to take them off? Just trying to make the perfect tenderness. The cooking temp is taken from exactly under the meat level in the smoker. Thanks for your help in advance.