I avoid diketones like acetyl propionyl , acetoin , and diacetyl , as well as flavors that contain sugar derivatives . That ' s just me though , a lot of people still use flavors with diketones in them , I just think it ' s best to avoid them due to popcorn lung concerns , and I think diketone free versions taste cleaner . Eliquid recipes has warnings on the flavors in their list to tell you whether the flavor contains these ingredients , and Bull city flavors has warnings on flavor listings with diketones . <| sep |> I didn ' t say illegal I said unethical . They are not elected officials and represent their states voters . For a resident of another state to contact them to urge them to vote a specific way against the states popular vote is unethical . It is one thing if they actually represent your state .