Just thought I'd chime in real quick.  For about the past couple months I have had a severe sore throat.  Saw all the remarks on drink a little water, lower the NIC content, and see a doctor, all of which I did.  What I discovered is that it was the silica wick that was causing my sore throat.  I now use a 100% cotton wick which seems to be doing me better (of course I have a rebuildable atomizer).  Just an FYI, I was chain vaping, which I am doing again, with no problem yet.  I'm glad this is working because I really need to get off the analogs!