I made my first brisket and I'm concerned about some things. I put my 8lb brisket on at 4 a.m. I expected it to take 14 hours when cooking at 250. Much to my surprise, at 8 a.m the wireless thermometer alarm went off telling me that my internal temp had reached 190! When I went out, the temp had creeped up to 325 (my gasket is shot). 4 hours vs 14. Is it ruined? I took it off, wrapped it in foil and towels and put t in a cooler. How long will it stay hot? This was supposed to be dinner, not lunch.