Really trying to find a way to end up with crispier chicken skin, whether on whole chickens, or breasts. I've tried cooking the chicken at 275 and then bumping it up to 325 for the last 30 minutes or so, and that outcome was a little better, but still rubbery. I've tried using oil first before applying rubs, I've tried drying it out really, really well before applying rubs (paper towels, sitting in fridge for an hour). I need some crispy skin!! Help!!!