Dont know if there are cheaper alternatives out there, but have been using this product for atleast 1 year and have barely used 10% of the bottle, and the screen has had no harm from the liquid. Removes marks from screen amazingly well. From fingerprints, to dead bugs.

Used this on a monitor with six years of dirt build-up. It cleaned it completely in less than a minute. This kit works really well.

My screens were all in bad shape and this product was exactly what I needed. The spray helps a lot when you have dried on dirt and the super soft brush is great for dusting and getting rid of static clinging dirt. The cloth is really soft and I trust that it will never scratch any of my screens. Good price too.