What products to put on hair when curling with a straightener?

[oguhnotorbiike]

My curls look amazing for approx 15 minutes then they disappear and I'm back to the lovely frizz!
What can I use to keep the curls in?

I use heat protector, do all the curls, spray with hairspray and leave them to cool for 10 mins. Then brush out with a wide tooth comb and hairspray again. Sometimes if the curls are a bit too tight I'll run the straighteners over them quickly before the final hairspray. I find mine last overnight if I've not curled my hair the same day I've washed it