Turn the screw in the expander by inserting the key in the hole closest to the upper front teeth and turn the screw straight back towards the throat until another hole appears.
Click here to watch the video”How to turn an RMI”. Please turn on the sound.
A gap might open between the front teeth – this is normal & will close up again. Clean the appliance VERY WELL. Follow the instruction in the video.
Call the practice if you struggle to turn the screw.