This mixture not only cleans the mirror (and faucets) to a shine, but it will help to prevent fogging while the shower is running.
1 1/2 cups white vinegar
1/2 cup water
8 drops citrus essential oil (lemon, lime, grapefruit, etc.)
Combine all ingredients in a plastic spray bottle and shake well before use. Spray solution onto mirror and wipe with a dry cloth or towel.
Recipe excerpted from The Naturally Clean Home, 2nd Edition ©2008 by Karyn Siegel-Maier with permission from Storey Publishing, LLC.