i have the leupold lens pen and it works good but you have to make sure there are no traces of dust or debris on it before you start using it or you will get swirl scratchs on your glass.i usually dowse the lens with a glass spray first then touch up the lens with the pen after things are dry. i dont like the tissue paper much but same with that you have to always be careful you not picking up dirt and then start swirling it around as you clean.