My van remote kept opening the doors on it's own. Or if you'd shake it. Thought it might be the battery, so I looked up changing it. Nope, didn't fix it. $300 for a new replacement key. Screw that...
Looked up on YouTube and learned that the contacts between the rubber membrane and control board get loose. You can buy a replacement key fob without the board for $11 on Amazon.
Then found I had all the contacts still, so with tweezers, I was able to gorilla glue them back for .12.
Works like new, and I replaced the battery proactively, so I shouldn't have to do it again for the life of the van.