The Charcoal Companion Flame Friendly FLEX Grill Sheets open up a range of possibilities for burgers on the grill. Cooking directly on grill grates can dry out burgers and drain natural juices. With FLEX Grill Sheets, burgers retain moisture and stay tender. Durable and heat resistant to 600°F, the sheets are reusable many times. Clean up is simple; once the sheets have cooled, place them in the top rack of the dishwasher or wipe them down with a damp cloth. The sheets also prevent buildup on grill grates so more time is spent grilling rather than cleaning the grill. USE: Before first use, wash and dry the sheets. Place the sheets on grill grates and then place food directly on the sheets. CARE: Once sheets have cooled, place them in the top rack of the dishwasher or wipe them down with a damp cloth. After cleaning, store flat or loosely rolled. Cleaning after every use is recommended. CAUTION: Sheets are heat resistant up to 600°F (316°C). While the sheets can withstand considerable heat, they should not come in contact with direct flame.