Always hand wash the cookie cutter with soap and warm water. Do not soak in water. Cookie cutters are not dishwasher safe. Store in a cool dry place with nothing heavier than other light cookie cutters on top. Cookie cutters made with 3D printed plastic have a low melting point and should be kept away from heat sources, such as direct sunlight, hot foods, stove tops, inside ovens, on hot pans, etc. Contact with heat and/or pressure may cause cutters to warp or melt.