We all know that a screen protector will help keep your smartphone's display as pristine as the day you bought it. But installing one can be a bit tricky. First, you have to make sure the screen is clean so that you do not install the protector over dust particles. That's actually the easy part. The difficult part is getting it lined up correctly and bubble free. There are many screen protector brands on the market. Some require water to install and some are dry apply. But none of them are as easy to apply as the PureGear® PureTek™ Roll-On Screen Shield Kit for many of today's most popular handsets.. It's simple, and gets the job done.