Millions of people use cockpit sprays without ever having any sort of problem, but many people also use it wrong. The best way to use this stuff is to spray a bit onto a micro-fiber cloth first, and then to wipe the surface with the cloth, thus transferring the spray onto the surface in a very thin layer.
Of course, removing old layers of the stuff regularly is also a good thing, but in my experience, many people think that if a thin layer is good, plastering it on is ten times better...