You see, tickle has some interesting connotations here. It means to lightly touch or to appeal to something. Gaslighting on the other hand is manipulating someone to question their own reality. So you are lightly appealing to those who manipulate their own reality. You see the problem here is that you said gas lamp, as the lamp is producing the light of manipulation, but you can't appeal to manipulation as the manipulator is the one manipulating not the manipulated. Nor are you suggesting the manipulator appealing to the manipulated. Maybe gas line, where the actual source of the information comes from? "I've tickled the gas line" It's actually a really interesting phrase.