Hi, I had a replacement gameboy color lens arrive in the post this morning. Im a complete noob to replacing the lens. The instructions were to remove the white sticky back paper from the back. After peeling it off, im left with a sticky back along with a white square embedded into where the lens screen is. Ive tried peeling it at the corners but its as if its embedded inside. Did I forget to remove something else? Ive attached a photo of what it now looks like.