tailgate does not pull to

Hi guys! My fat guy doesn’t have an el. tailgate, but normally you just have to lean on it, then it’s pulled on by itself. But it doesn’t work anymore for a short time. I have to lean on it and then put some pressure on it from above…then it pulls up. (comfort battery is new) The tailgate is now always totally smeared with finger and hand prints. Looks like… now my question: Did one of you ever have this problem? I thought first that maybe something got stuck, but I found ncihts. I disassembled everything and reassembled…nothing found. Thanks.