The above is about average for consoles I receive. I’ve seen much worse, but it never ceases to surprise me how much dirt can accumulate inside consoles that look to be in decent cosmetic condition externally. This is the first time I had the idea to actually photograph it though. I doubt most people realize how much material gets transferred from their hands to the console and becomes trapped inside when they fail to wash their hands before playing.
I always clean beneath the shoulder buttons before selling a used console. I used to only do this for liquid-damaged consoles, but I’ve noticed it’s often necessary even on consoles that look like they’ve been taken care of responsibly. So now I don’t even bother testing the shoulder buttons first to see if they need it. I just assume they do and clean them.
Unresponsive shoulder buttons are almost always due to dirt accumulation. It’s really amazing what slobs people are. Fortunately, cleaning the shoulder buttons is very quick and easy, so even destitute mud farmers like the people who let this happen to their consoles can fix it themselves.
The left and right sides are pretty similar, so I only took photographs of the right side to show the process.
The best way to clean is with isopropyl alcohol. Not only does it make removing even tough dirt easy, it also eliminates most odors, which may be important if there’s liquid damage. You can do a good job with just a combination of a toothbrush, toothpicks, and some cotton swabs. Obviously you’ll want to focus your cleaning on the recess in which the plastic button sits, but you should also clean the button itself. If you’ve noticed that your shoulder buttons are unresponsive and don’t make as much of an audible “clicking” noise as they once did when you press them, cleaning them can sometimes help with that
While you have the console open, it’s also a good idea to clean out the area beneath the SD card slot and the slot in which the stylus is stored.
Reassembly is easy as long as you haven’t lost anything along the way.
If I get around to it I might write about how to repair most cases of sticky/unrepsonsive face buttons next. If I get around to it.