It happened to me too. I bought a K68 RGB in early September. Right when it arrived, I noticed some keys were already off. Since it's my first mechanical, I though it was normal. Then, some days later, some keys, ususally Esc, Shift or Ctrl, started to pop off. So I did some research and found some topics refering to cracks in the key stems. When I started to check mine, I noticed that a lot of keys have cracks. Didn't want to check all of them, tho, to avoid making a bigger mess. That's just sad, because it's not a cheap keyboard. At all.
