I may have misunderstood you by your choosing the last option in the previous message. By the way, it is really none of my business whatever you do. I just want to say this cleaning task may be more complicated than you think. The improper chemical reacts with the wrong lubricant may generate a strong bond with the top film and leave a permanent mark. I am guessing the wrong quality of the lube may be the culprit. D600 has been released during the cool temp. Wait for the summer and in the sun, the internal debris may be sputtered everywhere. Don't quote me, I did not jump into the conclusion. It is only my past experience told me to be very careful about the quietness of Nikon company.
You guys still miss the point. Leading a new equipment owner to run the risk of damaging his property has shown that you're the non-professional moderators besides the wrong word using. I care less on your windshield story but thinking about your next move on the legal action. If you keep doing the irresponsible advices, some lawsuit may eventually follow.