Hi and welcome. I will hazard the guess the high PG in your juice is doing in your throat. Switching to at least 50/50 will help. I vape 30/70 for the same reason but, unfortunately, I can't tell you where to buy it because I make it myself. As luck would have it, cinnamon red hots is one of my favorite flavors, too. Flavor Apprentice-- a quality provider-- makes a very good flavor of it, based in either PG or Alcohol, the latter to make mixing in high VG juices easier. DIY isn't hard to do, you might want to look into it. Cheaper, too. Yes, cinnamon juices will crack a plastic tank. Switch to Pyrex and don't worry about it any more. If you want a recommendation, try an Aspire Mini Nautilus. Glad to have you here. We'll try to help.