I didn't and it wasn't heating up. Referred to the user manual.... duh. There IS a line of succession that needs to be followed. Do as it says and it works as it is intended. I've only used it once and I. Love. It. Already!!! We had grilled veggies and a T-bone steak. Golly it was tasty!!! I had an indoor grill years ago. This is sooo much better. No smoke either. Awesome kitchen grill!!