Ever have a flavor that you love but they make you hack as if you got a pin stuck in your throat. This happens to me with a few flavors such as the hangsen arabic, the hangsen highway (but the T5 is fine) and a few others. I mix them all with the same 75pg/25vg/18mg NIC base but some give me that stuck pin sensation after vaping them a while and others don't so it's got to be the flavoring. Don't get me wrong I love these flavors and vape them everyday. I think on my next batch of these I'm going to try a 50/50 base and see if that helps.