The surface of the LCD screen of the teaching all-in-one machine looks like a solid black screen. In fact, manufacturers will add a special coating on this layer of the screen. The main function of this special coating is to prevent the user from reflecting and glare from other light sources while in use, and to enhance the color contrast of the LCD screen itself. And this special coating, because it is exposed to the air, it is easy to stick to dust under the action of static electricity.
However, because most people do not understand the correct cleaning method, it is easy to make the following mistakes: Wiping with a soft cloth or paper towel can easily scratch the LCD screen; cleaning the screen with water can easily cause a short circuit of the internal equipment of the display, and water marks will remain on the screen. It is difficult to clean and affects the results of the LCD screen; cleaning with alcohol or other chemical solvents will dissolve the special coating of the LCD screen, which will seriously affect the viewing results.

The correct cleaning method is to use deerskin or good-quality glasses cloth to gently wipe to remove the dust on it. Fingerprints and oil stains on the LCD screen should be cleaned with a special cleaner for LCD screens. When using the cleaner, wipe from the middle of the screen to the outside until the cleaner on the screen is wiped clean. During this process, do not allow water to flow into the interface between the screen of the teaching all-in-one machine and the screen frame, so as to avoid a short circuit and burn the display. Do not use a hard towel to scrub the surface of the electronic whiteboard screen, so as not to wipe the surface of the all-in-one screen and affect the display results. It is necessary to clean the display screen regularly and quantitatively. Frequent scrubbing is also wrong, which will cause some adverse effects on the display screen of the all-in-one machine. In addition, to deal with some oil stains that cannot be wiped off, you can use transparent glue to stick it on the screen and then peel it off. The place on the screen will be very clean.