Question about Tefal Cube by Ixeo high-pressure steam straightener (UT2020)

Descale the appliance by preparing a descaling solution of 70 % white vinegar and 30 % water and pouring it into the water tank. Connect the appliance to the mains so that the vapour from the solution penetrates the tank and leave the mixture to work for several hours. Then empty the tank, rinse several times with clear water and repeat the process if necessary. Then switch on the appliance and press the steam button several times to descale the steam nozzles. Leave this process to work for a few minutes and repeat until the limescale has been removed.