While I was vaping on the deck last night I noticed my 510 was producing monster vapor. I came inside and decided to vape while surfing the net, and noticed a HUGE reduction in vapor. So I figured that my atty was dying, and that the huge surge on the deck was it's final sprint to the finish. Then this evening we were cooking out and I noticed that I was again making clouds of vapor. As soon as I came inside there was a huge drop in vapor. Finally back out for the final test, and sure enough the scientific reasoning hit me. Vapor contains mostly water vapor, and in a very humid environment it can't be absorbed into the air quickly. However, in lower humidity the vapor is sucked into the air almost instantly. This leads me to believe that maybe we should be more careful about making decisions about devices and juices based on visible vapor alone.