What to do before seasoning your grates
Before applying any vegetable oil to your grill grates, be sure to brush off & remove any any burned food particles that might be stuck to the grates. The best way to do this is by brushing with either a coiled stainless steel (no bristles!) or nylon grill brush before turning the grill on each time its used.
How to season your grill grates
With the grill turned off & the grates cool to the touch, coat all surfaces of your grates with vegetable oil. You can do this with a spray oil or a paper towel coated, but don’t go crazy because too much oil will cause flare-ups! Wipe off excess vegetable oil with a paper towel being sure to maintain an even coating across the grill grates. Turn on your grill to high-heat and let it to burn until it begins to smoke, burning off the oil, which should take between 15-30 minutes depending on your grill.
IMPORTANT: Read Your Instruction Manual Some grates are very fragile (looking at you porcelain coated grates) and easily damaged from scrubbing and scraping. Be sure to read and follow the manufacturer's instructions down to the very last detail or you might end up voiding your grill’s warranty.