Idle for a long time, the filter membrane has been dry. The filter element can be soaked in warm water for about 15 minutes. If that still doesn't work, soak the filter in an alcohol solution for about 15 minutes.
Idle for a long time, the filter membrane has been dry. The filter element can be soaked in warm water for about 15 minutes. If that still doesn't work, soak the filter in an alcohol solution for about 15 minutes.