I have had a minor sore throat for 2 days. It went away a few hours after I realized that the throat issues started shortly after I cleaned my atty's....and worse with the one I dry burned. I may not mean anything..but I then dry burned all of them again, cleaned them after the dry burn with vinegar and rinsed...a lot..vinegar smells..lol. now I have been keeping the well saturated and the sore throat is gone..I dont think I had them wicking as easily as they had been. I seem to be sensitive to anything left behind..any ash created?..or any scorching of the wick.They were NOT hitting with a burnt flavor..just enough to irritate..the wicks were darkening at the tips. I gave up on all of the models that had the wire wrapped directly around the wick..although most people seem to have great luck with them. maybe after 2 weeks..the atty itself is irritating your throat...I only say this, because it happened to me.