Car navigation touch screen is afraid of conductive media such as oil and sweat: covering the screen will form a conductive layer, which will lead to screen drift. Wash it by hand and dry it before use.
The car navigation touch screen is afraid of "high" temperature: the "high" temperature here is not baked with fire, but reaches a temperature of about 40 degrees, which may cause the capacitive screen to drift. If you keep this temperature for a long time, the capacitive screen will die. Don't bask in the sun, use it for a long time in the scorching sun.
Car navigation touch screen is afraid of magnetic field: especially electromagnetic field. If you put that small magnet on the capacitive screen for a period of time, the capacitive screen will temporarily fail.
Correction method:
Locate the restart (factory setting) button on the machine, which is a small built-in button that can be found on the back or side of the machine. All gps navigators have this button (used after crash).
After pressing the restart button, see if there is any response on the screen. If there is any reaction, take the time to calibrate the screen in the settings, and it will be fine after calibration.
If the screen does not respond after restarting, if the battery can be removed, charge the battery separately, and be sure to use the seat; If the battery can't be taken off, charge it with wires, and the charging time must be long; If it doesn't work, it can only be repaired.