How to solve the problem that the keys of the upright digital piano cannot get up?

Piano manufacturers teach you how to solve it.
First, the piano keys enter the water:
When children are learning the piano, they accidentally knock over a water cup or drink bottle placed next to it, and the water or drink flows into the keyboard. The keywood is damp and swollen, resulting in inflexibility and inability to stand when bouncing. If this happens, immediately wipe the water on the key with a dry towel, open the piano cover, and allow air to circulate. Also, ask a technical piano tuning lawyer to remove the keys, wipe the water off each piano key and dry, especially sticky drinks. Therefore, when learning the piano, you should be careful not to put water or drinks next to the piano.
Second, the debris is stuck:
Some children were eating and playing the piano, and food scraps fell into the crack of the key and stuck the piano key. When encountering such a thing, you can shake the piano keys up and down, left and right, shake off the dirt, and there will be no problem with the piano keys. If it is not good, only ask a lawyer for help.
Third, the environment is humid:
A common reason why piano keys don't stand up and teach is that the piano keys are wet and swollen, resulting in inflexibility. We should pay more attention to the maintenance of upright digital piano to prevent this problem from preventing. Hang a hygrometer in the room where the piano is placed. If you find that the ambient humidity exceeds 60%, you can hang a few bags of moisture-proof agent (silicone material) on the piano, or put some quicklime powder under the piano. If the relative humidity is particularly high, it is necessary to turn on the air conditioning mode, or install a water protection pipe inside the piano and use the heating tube to heat and drive the moisture. You can also buy a home to reduce the ambient humidity of the room.
Upright digital piano
In an upright digital piano, the piano keys cannot be activated, and minor problems can be solved by hands-on ability. Press the piano keys first and shake them from side to side. If there is no obvious practical effect, use a hair dryer to blow out the piano keys with common problems. If it may be difficult to solve, the piano keys need to be removed for drilling. This process requires professional learning, is very simple, and is easy to master.