Hi, my name is XXXXX XXXXX I have been in the home improvement and repair field for 20 years. I will be very glad to help you today. Are you referring to the infuser with the two orange button that have to be pushed in when removing?
Those buttons have to be squeezed inward before pulling it out. You may even want to push the whole thing in as you push the buttons.
Then pull it straight out. No luck?
If it is misaligned then it will be stuck and you will be unable to remove it. Replace the water tank, plug the unit back in and click the on switch. Push the on button and allow the infuser to become aligned again. After that process is finished then push the off button and wait for that process to finish. Turn it off at the back and unplug, remove the tank and the infuser will be aligned and easily removed.