Hello,
I have a Casio piano that is a few years old, and one of the keys makes this slightly annoying metallic ringing sound when played loudly enough, and only with certain instruments, such as the concert/modern grand piano instrument but not with the electric piano. The sound also doesn't happen when the piano is off. I think it might be water damage or moisture, because I noticed this happening after I played piano after washing the dishes, and I don't think I dried my hands thoroughly.
Any idea what part might need fixing and how to go about doing so? I have blowed compressed air and nothing has changed. I am open to the idea of opening up the keyboard but don't really want to mess anything else up.
I have attached a video. It's on the "F" key. It's not super noticeable in the video but it's present.
IMG_2131.MOV
