My wireless keyboard had become basically unusable. After having several sodas and coffees spilled on it, some of the keys were stuck and sometimes they would make it impossible to use the computer because they would fire repeated key press signals. Eventually it got to the point where I had to remove the batteries to prevent it from interfering with using the mouse. My stepson hooked up a wired keyboard that he wasn't using, which quickly became a nuisance because it would be left on a side table and the cords would block the path across the room.
Finally, it became clear that something needed to be done. I didn't feel like shelling out the $100+ for another good wireless keyboard, so I decided to try and clean the one that I have. Here are the steps that I took: