Yes Phil. I have blown it, Arctic Butterflied it, used Eclipse fluid and special wipes on it but to be honest I am scared to death touching the sensor! Hands shaking etc (and no its not the drink!). I don't seem to be able to shift the little ******s. I have read on the web that it often takes several goes to shift the stuff but I am basically "chicken". I would rather pay and know that my 5D is in safe and competent hands. I would hate to wreck it. So I was just checking where it was safe to send it.