When you attempt to turn the aebleskiver, it should slide very easily. If it doesn't slide easily it's either not yet cooked enough, the pan isn't seasoned enough (if you're using cast iron),or there isn't enough grease in it. Additionally, there's often something about the first round that never goes quite as well as all the subsequent rounds. Once you have that initial "film" built up from the first round, it all goes smoothly from there.