How to Use Lock Function: The SMART-XTM High Efficiency Dryer allows you to lock your style settings in place to prevent accidental change during use. To lock your style settings, move the ON-OFF switch to the LOCK position, with the lock symbol. When the dryer is set in the LOCK position, you cannot adjust the heat or speed settings, but the cool shot function may still be used. To change your style settings, simply move the ON-OFF switch from the LOCK position back to the ON position.
How to Use the Self-Cleaning Function: The dryer will alert you when it must be cleaned. All three speed lights will flash simultaneously for 5 seconds. During this time, the dryer will NOT function. It will resume functioning on the sixth second. To engage the self-cleaning function, hold down the "Speed Lower" button for approximately 10 seconds. The dryer will automatically self-clean for 15 seconds. Once the cleaning is complete, you may resume using the dryer as normal.