Ok, had another go at this tonight cos it had been going wrong recently. I cooked the chicken first, transferred it to a saucepan and puts loads and loads of diet coke in out of a new bottle with some chinese 5 spice- a pound from in-store. well it was beautiful, loads of sticky sauce. I think the reason it had been going wrong was i was not adding enough coke, I put lots in and it took a while to boil down but was well worth the wait. i was wondering what else people cook in sugar free drink and what drinks you use? Would lemon fanta taste good with chicken?