Now as you can see a mirror this size one going over is nowhere near enough. I usually do about three or four going overs with the cleaner. It just depends how dirty your mirrors get but for me with my family our mirrors get very dirty so I will go over and over it. To me there is nothing worse than a mirror that is dirty and it just makes all the difference in your bathroom. So be sure that you give it some good elbow grease because if you have got greasy marks on there it is not going to come off by just wiping over it softly. You have really got to press that glass cleaner into your mirror to get that smudge off and you know for a while you might have to go over the same few marks a few times but the good thing about these clothes is that it doesn't leave lint. I don't know if you can see that but there is no, you know if you use some paper towels or something you'll see little tissue fibers. These things are great because you put them in the wash and it takes out all that lint so these are a great way to go. Very affordable as well.