This Magnetic Dishwasher Clean Dirty Sign can help you easily tell whether the dishes inside the dishwasher are clean or not! It easy to install! Simply slide this sign to indicate whether the dishes are clean or dirty. There are two ways you can install it. Since it is magnetic, you can stick it right away on to metallic surfaces. If you want to mount it on a non-metal surface, such as wooden cabinets, just stick it using its adhesive.