There may be many reasons for poor contact of the Type-C interface. Here are some common reasons and solutions:

1. Dirty interface: The Type-C interface may accumulate dirt due to long-term use or environmental pollution, resulting in poor contact. The solution is to use a clean cotton swab or soft cloth dipped in a small amount of alcohol or cleaning liquid to gently wipe the interface.
2. Loose interface: Long-term plugging and unplugging may cause the Type-C interface to loosen, resulting in poor contact. The solution is to try to replug the interface or replace the interface.
3. Aging of the wire: Long-term use may cause the Type-C wire to age, resulting in poor contact. The solution is to replace a new wire.
4. Damaged device interface: If the Type-C interface itself is damaged, it may cause poor contact. The solution is to replace the device or interface.
5. Device driver problem: Sometimes, there may be problems with the device driver, resulting in poor contact of the Type-C interface. The solution is to update the device driver.
6. Electrostatic interference: Electrostatic interference may also cause poor contact of the Type-C interface. The solution is to use an electrostatic eliminator to eliminate static interference.

In short, there may be many reasons for poor contact of the Type-C interface, which need to be investigated and solved according to the specific situation. If the problem cannot be solved, it is recommended to contact the device manufacturer or after-sales service center for repair or replacement.