ZWILLING stainless steel barbecue utensils are dishwasher-safe, but this exposes them to aggressive cleaning chemicals over a long period of time, which can lead to wear of the material and handle (discolouration). If you do decide to use a dishwasher, the washing temperature should not exceed 55°C.
The detergents used in dishwashers often contain aggressive cleaning chemicals, which can damage the surface of plastics and steel. So, be warned: Washing in a dishwasher can shorten the lifespan of utensils.