Elio, Ten. It took 2 or 3 just to get the sensor swipe right. Then a couple more to get the right amount of Eclipse fluid on correctly. Once I got that all figured out and I relaxed, it actually took about five turns. I followed the instructions in the Copper Hill tutorial exactly, but I learned to use 2 drops of fluid on each edge of the end of the swipe, and let the fluid soak into the paper for 5-10 seconds before swabbing. I alternated horizontal and vertical turns.
I'm sure that my next cleaning will not take nearly as long.
I may also get a sensor brush, which I don't yet have. But the Rocket Blower is an important part of the process, too. I used before starting the cleaning attempts, and between each attempt.