I installed a screen protector for my phone recently and with it they included this small flexible rubber squeegee. Seems kind of a waste for one use in terms of the phone but I quickly thought of a great way to reuse it again and again. The standard spreaders that I use on automotive work are just too stiff. I've also tried credit cards with some luck but the putty tends to stick to them. This one is really a soft, flexible, rubber. It was for a Kindle with the 8" screen if you look for one.