I am a real estate photographer, and I can't tell you how many times I've seen dust particles in my photos. It stresses me out to no end, they're like a disease, really. So I would spend about 20 minutes frantically cleaning my sensor with lens cleaning solution, multiple cotton swabs, microfiber cloths, and tissue papers. I would lightly damp the cotton swab and then spend 15 minutes trying to get rid of all the streaks on the mirror. Then I would have to blow all the dust out from the cotton swabs, micro cloths, and tissue paper. It was a ORDEAL, and a stressful one at that. I dreaded changing lenses because it was inevitable. Dust was going to sneak in no matter what.After purchasing these sensor swabs, it literally took me less than a minute to complete undo what I had done with my weird method. It got rid of all the dust, streaks, everything. IN ONE SWIPE. I am so thoroughly satisfied, you have no idea! It says to not re-use the swabs, but after I got done cleaning my a6000, I went ahead and cleaned my a68 with the same sensor swab. No harm done.I am so happy that I don't have to spend 20 minutes cleaning one sensor anymore! (And potentially damaging it!) This is safe, FAST, and affordable! I recommend it to all. And they give you enough to last for a very long time. It's a good idea to keep a few in your bag, just in case! Love this!