Advice needed! I have made some marmalade to give as xmas present and followed the recipe however it hasn’t set. I Jarred it yesterday thinking it would set like Jam but it hasn’t. I’ve read similar post which say to reboil it but can I after it’s been jarred for 24 hours? I would resterlised th jars etc but not sure if I should do this at this stage. Any advice would be amazing!!!