The video above gives you the best eco-option for glass cleaner; make your own. Window cleaner would probably top the list of natural cleaners that most folks are a little unsure about. It is really possible to get a clean window without chemicals; just try one of the following and see!

Window Kleener
This entry from Earth Friendly Products uses coconut-based soap and vinegar to get the job done. For a review, check this.

A Whole Lot of Eco-Friendly Glass Cleaners
This page lists a wide array of products that fit into this category.

Terracycle Window Cleaner
This article is all about the company and all the cleaning products that it offers, one of the products is a window cleaner.