I used these to clean the sensor on my Sony a6000 mirrorless camera.After a crystal clear day of outdoor shooting I came back to find loads of nasty specks in the blue sky of all my pictures! I should have known better, the last time I used the camera I noticed a piece of dust on my sensor and tried to blow it off with my mouth (BAD IDEA!). I was worried, especially seeing the aftermath, that I had somehow done some expensive damage to my camera.After doing some research on how common dirty sensors are for mirrorless cameras, I came across this product. In tandem with a Giotto Rocket Air Blaster and some microfiber cloths, I set to cleaning up my lenses and sensor. I set up with a bright light I had around to really get a good look at the sensor and it was filthy! I photographed a sheet of printer paper to test for specks at each step.First I took a test shot at f/16, ISO 100 & ~1 sec exposure to see how bad it was (first picture). Second shot (3rd picture) was after using the rocket air blaster, which got a couple of pieces off. Then I set to using about 4 of these swabs, a couple with the solution, until I could no longer see any specks on the sensor when shining a light across it. The last picture (middle image) is what it looked like afterwards - night and day! I was so relieved it worked so well, and was really easy to do. Do not feel intimidated by this process, you just need a clean, still space with a good work light and this should do the trick just right.PROS:- Impressive packaging - each swab comes individually vacuum sealed in what appears to be a mylar pouch, completely clean- Extras leftover from one cleaning - could probably get 2 - 3 sensor cleans out of this kit- Near-perfect size for my APS-C sensor, just slightly undersizedCONS:- Bottle of solution was a little confusing to get open - after you screw the top off, there is another flat plastic cover that sticks into the hole. You have to peel up the edge of this cover to pull it off the top of the bottle before you can get any solution out. It just wasn't very visually apparent the piece was supposed to come off. Once this piece is off, it is very easy to get drops out (If you're having to squeeze very hard you probably haven't taken this second cover off). Clearer instructions (with pictures) could help.Will definitely be using these in the future!