Two thoughts from a lee's perspective. I think the use of lotion or baby oil is very dependent on the person you are tickling, and perhaps the tools you are using--for me in particular it does not enhance the tickling, much to the dismay of many a ler. Sorry! But---I will say that when my feet are warmer, they are more ticklish, so I could certainly see where a hair dryer could be beneficial, especially if you are in bondage and have gotten a little chilly. I am particularly ticklish in the morning, when my feet are still warm from being under the covers, or after a hot shower. So I don't see why a hair dryer would be any different.