There is an article on the homepage that might help.

My experience taught me to be patient and take it easy so as to not break anything. It was almost as if you had to twist the plastic "star" and gently pull the cluster apart at the same time, focusing on the spot where that you're twisting. You can kind of feel when the "star" releases a little bit. Do this for each one and work your way around gradually loosening each spot around. Take your time for each one.

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