So...after my not so little 18 month old has driven me into a zombie state with her overpowering need to wake up crying in the night almost 6 nights a week, I thought we had a breakthrough. A certain popular brand of plug in room diffuser but at £6 a pack for 5 refills a full night sleep was starting to get a bit pricey... STAY WITH ME... I was stood in the supermarket in my zonbie half asleep state when i realised...what do they actually put in these things that makes my chi