It is always important to heat up the pan before cooking. When you preheat your pan over medium-high heat for at least 5 minutes, you’re avoiding the risks of getting hot spots.  Hot spots are a hassle most especially when you’re cooking meat. This is because it can overcook some parts of the meat, while some parts remain uncooked. To do this, you can do the quick water technique. You can flick a few drops of water on your grill pan and if it quickly dries up, then it’s perfectly ready to use.