Hi, I've just joined the forum and have one must know question. I am a total convert to vaping and will never smoke a cigarette again. The ejuice that I have been enjoying is a 50/50 PG and VG mix. There is just one problem. Everytime I start puffing in the house or the car my girlfriend complains that it gives her a headache. She tells me that she has exactly the same reaction when there is a smoke machine in a nightclub. Can anyone tell me if smoke machines use a PG or VG type base so that I can identify the culprit. Thanks in advance for any feedback.