John Baines cannot tolerate a dirty pit. The owner of JB’s Barbeque & More, on the northeast side of Houston, gets calls from aspiring pitmasters in the area who are looking for advice. He tells them the first step is for him to get a look at their cooker. “When they open their pit and I see all that gooey stuff,” Baines said, referring to the buildup of soot and grease some people call seasoning, he tells them, “If you want me to mentor you, clean it up and call me back.”Baines has been cooking barbecue for 25 years, but he’s been a pastor for longer. He started with a small Christian congregation on the northeast side of Houston in 1995. His Heart of Faith…