First of all - it was more than a mop, because the sensor was pretty messed up by previous cleaning attempts. You have to buy the Swabs according to the size of the sensor - the width has the height of the sensor. The swab is drizzled with the cleaning solution and then with a rapid train and some pressure (the handle must be something bend) over the sensor. If you ensure that the swab is not the padding on the table, you can also use it to hire a second time. I have also used other systems, but this was the first one that really worked for me (the sensor is again perfectly clean)
