Panini Grill Cleaning & Maintenance The Waring™ Commercial Panini/ Toasting Grill should be cleaned after each use, with warm soapy water. The exterior of unit may be cleaned by carefully wiping with a damp cloth. Clean plates while the unit is warm, using warm soapy water and the cleaning tool provided. DO NOT USE COLD WATER ON WARM PLATE. To clean drip tray, carefully remove tray, wash with warm soapy water and dry. Tray must be completely dry before putting back into the unit.