Just noticed my asr button has stopped working, anyone had same problem. Don't know if water has got in, the fog light button wernt working but after a few presses are ok. Button defo clicks but No light and warning that asr is off.
I'd just check the wiring from the bottom first. It's very ease to pull the plastic around gear-box out. Just unzip the leather and pull by heaving your fingers from inside down. You might give it a clean and spray some contact spray or WD40 as a first step.
No, it will damage mostly everything it touches, plastics and whatnot.
Screwdriver, water, soap, hairdrier. Used it on that exact switch as well as many others(when I was into PC overclocking I used to clean a lot of electronics this way and never damaged one). Take it off the car, dissasemble it properly, wash all the parts in the sink with water and soap, dry with hairdrier or left in the sun for 1 hour, assemble back and voila.
Although, if the button pushes properly and makes a click, it might be some other fault. A friend of mine had that exact problem a week ago and changed 3 botton asemblies, the part with 3 buttons and LEDs and all that, but fault was somewhere else, sorted in the meantime but I have no idea where the fault was, will ask.