Well, I would lock the mirror up and use a rocket blower first to see if the dust comes free from the sensor before wet cleaning. He said he only cleaned the mirror. @FastGlass, I was going to say the same as Jake!
I've used mine a few times. Great for crowded areas where you might get bumped and loose grip of your camera. I ordered one from Adorama first, but they were back ordered. So I got one from B&H. But, I forgot to cancel the order from Adorama. Now, I have another on the way! I also connect mine...