
Just came across this big, red stain inside my 5252 keyboard. Along with the cable, the backplate is roughly as heavy as an SSK! It squarely beats the Onmikey backplate per my information.
But that big red stain though.
As long as it isn't BROWN and smelly, nothing to worry about but cleaning and removing that RED stain is a priority just in case CSI confiscates your keyboard, in a murder case and try to pin it on you.