Mitsubishi Electric AE-200A Instruction Book page 60

4-1-3. Cleaning the touch panel
(1) On the Login window, touch the "Touch-panel-cleaning"
button.
(2) Clean the touch panel with a soft dry cloth, a well-wrung
cloth that has been soaked in water with mild detergent,
or a cloth dampened with ethanol.
Note: Do not use acidic, alkaline, or organic solvents.
(3) After cleaning, touch the squares with numbers from 1 to 4. The screen will return to the previous screen.
Note: The squares will change to gray when touched.
WT07190X01
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Touch-panel-cleaning