Hey @andrewifix! I’m sorry to say we don’t have a good guide for getting to the buttons on Joy-Con controllers yet. We do have a couple guides and a teardown that you can probably use to get most of the way there, though! Check these out:
[guide|113185|Right analog stick replacement] [br]
[guide|113182|Left analog stick replacement] [br]
[guide|78263|Joy-Con teardown|stepid=156432]
If you decide to get in there and do some cleaning, take some photos and make a guide out of it, we’d love to have it!