Ok, i'm dead set on pulling a brisket. Tried it with the foil, towel, and cooler a couple weeks ago and apparently didn't get it hot enough. its about 2.5 - 3# brisket. and i am cooking it at about 215 -225 its been swinging.. and my internal temp on the dumb thing isn't getting past 145 degrees. its been on for close to 3 hours now. i'm flipping it and spraying it with apple juice every hour so far. and i'm using a basic beef rub with some cajun seasoning. should i crank the heat.? or just keep letting it sit.? fill me with knowledge please.