Long story short.
87 year old mother has what must be approaching an unhealthy obsession with BOM.
Due to seasonal unavailability in shops, I'm ending up making regular batches but can't get the damn stuff to set properly. Mum ploughs on through jar after syrupy jar.
I've used all sorts of recipes. With jam sugar, with granulated, with pectin with and without lemon, I've boiled it to 105°C, made sacrifices to the gods and danced in the woods naked under a new moon. I've done the thing with cold saucers in the fridge.
I'm following recipes specifically for BOM from all over the internet.
Ideas?
The worst of it is that I dislike marmalade.....