Put both AirPods in the charging case
Close the lid and wait 30 seconds
Open the lid
On your iPhone or iPad, go to Settings > Bluetooth
Tap the More Info button next to your AirPods
Tap Forget This Device
Confirm the action
Keep the AirPods in the case with the lid open
Press and hold the setup button on the back of the case for about 15 seconds
Release when the status light flashes amber, then white
Reconnect the AirPods to your device