I was hoping this would cover how to get all the pieces apart; I just purchased one and I can only get the lid off; can’t get the inside pieces out so I can wash it. :(
If anyone else is having trouble, their customer service got back to me SUPER FAST and their suggestion worked: “The trick is to remove the lid and then place one thumb at the front of the upper tank, and one thumb at the back of the upper tank and then to pull straight upwards. Lifting straight up is the key to easily removing the upper tank.”