Got a Eweadn mechanical keyboard and I really like it. After months of use, however, this greenish teal/turquoise stuff accummulates on the keys I use the most. It also accumulates on the sides of the keys, and it doesn't clean off easily. It seems to originate between the circular cap and the rose-gold plated rims. What is?
I apologize if this isnt the correct community to post this in, i couldnt find a generic 'what is it' community.
That looks like corrosion to me too. You might be able to clean it off, but it'll probably come back unless you seal the copper or wipe them all off regularly.