There is a product called Plantfume 101, I think it's still available. Can full of tobacco and various other nasties that you put a lit sparkler into and the tobacco base burns releasing smoke. They work great but stink to high heaven (for days), can't say I have ever seen them ruin plants, I used to use them late in the crop on colored up poinsettias when most sprays would burn the "bracts" of the plants. I know if a human were to stay in the greenhouse they would be DOA, I'm sure a tank would be the same.

Sorry this post really isn't to the point, I just find it interesting that the OP is seeing problems on plants handled with a "smokers hands".