Chosen Solution

So yesterday my GameCube wave bird controllers left trigger was working fine but now it’s not. I press it down all the way and the receiver lights up but pressing it half way down gives me nothing so I can’t even use the trigger at all. How should I go about fixing this? Is something broken or does it need to be cleaned?

Be brave you have nothing to loose. Open it up and spray the switch and everything inside with contact cleaner.