I have been vaping some DIY juices lately. They are 50/50 PG/VG mixes. I have found that sometimes when I lay down at night, I get a strange "tickley" feeling in the back of my throat. I don't need to cough or anything, just an intense itchy or tickley sensation. Drinking water only helps a little sometimes. A cough drop does help. So, I was wondering if this likely to be caused by either the PG or VG? I wonder if it is the thickness of the VG or if it is more likely to be some sort of reaction to PG? I am hoping that others have come across this too and might be able to give me some insight.