They brought this product out awhile ago and my sister got me a bottle because I wanted something to clean the salt off of my lamps and the outside of the tank.. Its all natural and no harmful chemicals.
Either way don't spray it into the tank! always away or a different room if you can.. I spray the windex on the paper towel then I proceed to wipe the outside of my tank..
I just use regular Windex... as already stated, just stand away from the tank, spray on the paper towel and then wipe the tank....outside only, of course
I use regular Windex as well after each water change on the exterior. As crawdad mentions, just be sure to spray on a papertowel and away from the tank.