This is related but not a duplicate of this question.
Apparently, I used fresh kiwi and mango in my jelly, and now it does not set. I know what I did wrong; but what can I do about it?
E.g. Can I add gelatin powder to the mixture to improve the chances of it setting?
I know that as a last resort I can probably take the fruit out and consume them directly, but then the jelly would be wasted (drinking sugar syrup is...not very pleasant).