The 3-2-1 method is a popular method that refers to smoking the ribs for 3 hours directly on the grill, 2 hours wrapped in foil with liquid, then another 1 hour unwrapped and covered in BBQ Sauce. However, if you don't do it exactly perfect, this method can soften the bark and remove a lot of the rub. Even when done right, I can barely taste a difference, which is why I prefer not to use it. Plus, this method adds an extra hour or two of cooking time.