Just to reiterate what Matt has pointed out about spray adhesive. I suffer from a form of epilepsy, which i hope is now controlled by the pills i take(and before you say,thats why i joke about)Where this is leading to is , i was chatting to a customer about my condition(Which started about 9 years ago)and he said his father suffered from it also. Apparently he worked in a factory and they put it down to all the different adhesives he used. Makes you wonder doesn,t it.