Cleaning is very important for the optimal use of your IQOS 3 DUO Holder. First of all, remove the holder from the device. Now open the cap and remove the tobacco stick. Clean the white ceramic heating blade with the cleaning brush that comes in the IQOS 3 DUO kit. For stubborn stains, you can use a cotton swab soaked in isopropyl alcohol and then close the cap. Wipe the holder with a dry, soft cloth. Do not use water or any other cleaning agent. Finally, put the holder back on the device. If you follow these steps, you will ensure that your IQOS 3 DUO Holder works properly and lasts longer. Cleaning is very important, so do it regularly!