Reset Xiaomi smoke detector

Configuration
1

Anyone knows how to reset a Xiaomi smoke detector?
I had it paired to zigbee2mqtt but have now got a new coordinator and they have to be re paired.
I tried to push the test button 3 times to pair but no luck.

2

Have you looked in te supported devices? https://www.zigbee2mqtt.io/information/supported_devices.html

Often there are instructions on how to pair.

3

Yes and it only mentions the pressing the button 3 times.

4

Solved.
It actually WAS re paired all right. I just couldn´t test it with the TEST button.
It has to detect real smoke to change state in HA.