I made a rainbow to stand up on the top of a cake out of fondant mixed with a little tylose powder. It's been drying for a couple of days and I picked it up today and it started to bend in the middle and a big crack has formed. Can I fix it or do I have to start again?

I think the problem might have been not enough tylose or too much water to stick the different colours together.

Can anyone advise please.

AHave you tried using sugar glue?