Spring noise on keyboard

[Samhfx]

Yesterday I made a silly mistake and spilled a little bit of coffee on my keycaps. I cleaned the caps but today one of my keys is making a spring noise everytime i push it down. what should i do?

Ducky One Keyboard.

 

[Habakkuk]

Assuming it's out of warranty, buy a replacement keyswitch, take apart the keyboard, and solder in a replacement.

Mech keyboards are repairable but fiddly to disassemble.

I've heard of people using a straw trick to drop IPA into the spring mechanism, but it's not worked for me.