My experience: I had a sticky mono switch on a Marantz 2230 and despite trying Deoxit it would not work properly. Getting the switch apart was pretty easy and cleaning it was straightforward. My issue was getting the little metal pin at the top of the switch to go back in correctly. It took dozens of tries with lots of losing the pin and needing to go looking for it inside the unit. Many bad words were uttered. It is not for the feint of heart but sometimes there is no other options available other than replacing the whole switch. Just be prepared for a ;ot of trial and error and keep track of that little pin should it go off on its own adventure.