Removing a monroe can be a little tricky, I’ve had some funny experiences trying to remove mine at times! I usually place my thumb and index finger on the ball and then slip my other thumb and index finger inside my mouth and place them on the back of the disc. I then turn each side in opposite directions and can usually undo it. However, if it has been done up too tightly you may need to seek assistance. In this case, I recommend going to a piercing parlour and ask for help there. They will usually do it without any charge!