Burnt on syrup on my pan

[Samuelvw1]

So looks like I burned my pan burnt on syrup inside it to be exact the looks like taffy in the middle I don't think I killed it but what's a good way to clean it after the take the majority of the syrup out someone said white vinegar and light a small fire any help would be great
Thanks
Sam

[BAP]

White vinegar and keep it warm but not boiling. Keep scrubbing it every so often. Be careful of the fumes, they will be strong. Should clean right up.