I cooked my last lot of ribs, in their marinade (which must have something in it that will go sweet and sticky), wrapped tightly in foil in a very low oven for about two and a half hours, then barbecued them fairly gently for a few minutes, with a bit of baste that I'd reserved. They were grand, and I saved money by not using all that barbecue gas! They do need long, slow cooking, whatever you do.