You can change the bag by pressing the handle with 1 hand and pull the upper part up, the bag is now still in the bagholder and the upper part of the DiaperChamp is still attached to the bag. Then squeeze the most upper part of the bag and press with your other hand on the button to make sure the bagholder is removed from the upper part. Pull the bag out of the pail and throw the bag away. (See the instruction video on the website)