For the easiest and cheapest way to get your mirror clean, dilute white distilled vinegar with water, and put the mixture in a spray bottle. Spritz your mirror and wipe it off with a newspaper. When you're done, the paper can go straight into your compost, so this method's not only cheap, it's eco as well. If you're not big on cleaning with newspaper, you can also try using microfiber cloths.


Source