Contact cleaner spray is very volatile, and well, very corrosive tbh. It's purpose is to get crap off contacts. If you overspray at all, very good chance it'll booger up your plastics. It's not bad enough that it will dull them but some of the stuff, DEET is an excellent example will chemically combine with your plastic, make it sticky like a fly trap, and it will stay this way for days sometimes, catching every little bit of dirt and crap that comes along until you neut with another spray....
The phenolics and stuff circuit boards are made of, can stand up to this, the resins and stuff in carbon fiber fairings and charger shells, etc.. maybe not so much.
IF you are going to be spraying any contact cleaner or crap like that (AFTER you have done all your other diagnostic tests, in an orderly fashion as Morgan suggested) spray some on a Q tip and rub it on some of the plastic in an out of the way place, like under the seat first, that way if it IS going to be eating stuff, you find out before you get yourself into a huge mess.
Aaron