I started vaping back in July. I had thought about trying it for weeks before that, but my wife and I decided it was time; so we went and bought an Ego T starter kit. From the point we switched, we went 2 months without an analog cig. We started experimenting with different mixtures and I started getting sores on my tongue. I relapsed and started smoking again but my wife continued vaping. I'm thinking that something in the different mixtures caused the sores on my tongue because when I stopped vaping they went away; then I tried again with the liquid my wife was using and sure enough, the sores came back.
Fast forward to February, I did some thinking and decided to give it another try. I'm using 100% VG because that is what we started with which worked fine for the first 2 months for me. So now, we will have to wait and see if it works out for me.