Maintenance > 137...THE TOUCH SCREEN DISPLAYTo clean the display surface, use a soft cloth, either dry or moistened with neutral detergentor ethanol. Do not use any organic solvents, acid or alkali solutions....THE LED HEADClean the LED head when printing does not come out clearly, has white lines or when textis blurred.There is no need to switch the MFP off to clean the lens.1. Pull the lever (a) firmly to release the lock and then gently raise the scanner (b).2. Press the cover release (a) and open the top cover (b) fully.CAUTION!Be careful not to stress or damage the touch screen display.baba