After treatment, always turn off the device by unplugging the electrical outlet. Before and after every use, wipe clean with a soft, lint free cloth. We recommend carefully cleaning the contour adapters with a slightly damp cotton swab.The glass filter can get hot during use, please do NOT touch or clean the filter for at least 5 minutes after use to allow the window to cool down. Do not use water or other cleaning fluids, as these can damage the device leading to a potential safety hazard.