I didn't find any how to, so here is a bit of what I did: Failed: compressed air Failed: cleaning under the key. Success: Remove the key (careful, these key

I didn't find any how to, so here is a bit of what I did: Failed: compressed air Failed: cleaning under the key. Success: Remove the key (careful, these keys really like to break the bottom u hooks) Remove the butterfly Peel off the glued membrane Cleaned all with 90% alcohol. Took a new membrane (you might be able to use old) and used E6000 glue and a toothpick to glue it back (don't get the contacts). Replaced butterfly and key. Not a good solution, but it worked. I got the key, butterfly, and membrane from replacementlaptopkeys.com. It looked like the contacts were getting coated/corroded and not making good contact? Perhaps heat?