Tailored to fit the APS-C sensor size, these swabs are simplicity itself to use!Instructions are clear and easy to understand, and in use the swabs cleaned my rather dusty A6700 sensor in a single pass.Set the camera to sensor cleaning, remove the lens, 2 drops of liquid to opposite sides of the swab, then a single swipe, with pressure enough on the handle to just start to bend it, and grime is removed.As a bonus, there is sufficient fluid provided to drop onto a microfibre cloth and clean lenses, viewfinder / screen etc. without worrying if the liquid will damage them.Can't be less than 5 stars, can it?