The sticky papers are the best solution, it is cheap easy and quick, beats the wet sensor clean and less chance of damage. You obviously need the eyelead sensor cleaner to go with these, but you only need to use half the paper each time so you basically get double the uses out of them, very happy indeed, is has been a real solution to my D600 sensor issues.
The eyelead sensor cleaner does such a fantastic job that the tip needs cleaning from time to time. To avoid losing its sticky-ness (if that is a word) these paper cleaners do a brilliant job of doing this. Highly recommended.