After having lung surgery a year ago, I have found that my breathing, including tightness , breathlessness and coughing have worsened immeasurably, Yes at first I believed it to be results of surgery but my Consultant has reassured me that there isn't any reason for my symptoms and my lung function tests come back normal, I vaped for 4 years before my surgery without problems so is it possible to develop a sensitivity to PG later in a vapers journey? I make my own liquid using concentrates from either La Tabbacceria, Drakes and Juice cabin and mix them at 50/50 VG/PG @20mg Nicotine. So I'm thinking of testing for a possible PG sensitivity by mixing up my liquid differently. Does anyone with a PG sensitivity do this? would reducing the PG to 30 or 20% be enough or would I have to go 100% VG? If so, would it be ok to still use the concentrates that are PG and would I need to change my 72mg Nicotine to 100% VG? I vape MTL and already go through lots of coils due to only using NET's, would 100% VG clog up the coils even quicker? I enjoy a good throat hit and fear that by eliminating PG I will forfeit the throat hit, Sorry for all the questions, but realise that the only place I can really get knowledgeable answers is in a forum of vapers tia