Commercial cleansers often produce fumes that can be dangerous, so it is best to remove the oven racks from the oven and clean them outside in a well-ventilated area. Place the racks on some newspaper, and apply the cleanser while wearing gloves. Let the racks sit for a period of 10 to 20 minutes before rinsing.
An alternative way to clean oven racks is to place them in a tub of hot water. Add dishwashing soap, vinegar or baking soda to the water, and allow the racks to sit overnight before rinsing.Learn more about Ovens & Ranges