If you grill comes with cast iron cooking grids, It is very important to season cast iron cooking grates, just like cast iron pans. It’s necessary to season and Re-season cast iron cooking grates; the oil will help protect the cast iron, decrease sticking and protect the grates from rusting.
Wash with liquid dish soap, dry right away with towel do not let it drain dry or wash in dishwasher. Spread a thin coat of solid vegetable shortening or oil over entire surface with a paper Towel; do not use salted fats such as butter. Pre heat BBQ grill (with grates removed) 10 minutes with all burners on HI and lid closed, open lid and turn control knobs to OFF, now place grates on grill, use CAUTION very hot surfaces, Re-light grill and turn control knobs to Medium-Low, close lid and allow grill to heat grates 45 minutes to 1 hour. Turn all burners off and leave cooking grates in grill until they cool.
To prevent rusting, grates should be Re-seasoned frequently; new grates should be Re-seasoned after each use. If rust is present please brush off with wire brush, Important: do not do a burn off after you grill, rather leave the cooking residues on the grates and spread a coat of Cooking oil on grates, then do a burn off just before you use your grill the next time, brush off charred residues with a steel brush before cooking.
Storing grates for extended periods of time, coat with thin coat of vegetable shortening, and store in a dry place.
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