1. The touch keys may need to be cleaned or replaced.
2. Because of long-term use or dust, touching the keys may be insensitive and need to be cleaned or replaced.
3. If it is a cleaning problem, you can use a soft cloth dipped in a small amount of detergent to wipe the touch keys; If it is a replacement problem, you need to contact after-sales service or professional maintenance personnel for replacement.
At the same time, it is also necessary to pay attention to keeping clean when normally used to avoid dust and other substances entering the interior of the touch button to affect the use effect.