For Spotty Mirrors, Try Black Tea
Tannic acid in the tea helps remove water spots. Pour room-temperature tea into a spray bottle, and wipe with a lint-free cloth.
For Cloudy Shower Doors, Try Dryer Sheets
The fabric-softening sheets contain ingredients that cut through soap scum. Just dampen with water before wiping down glass surfaces.
For Rust Rings, Try Lemon Juice
The fruit's acidity will help dissolve the stains left behind by shaving-cream cans and other metal containers. Bonus bathroom cleaning shortcut: To prevent future rust buildup, coat the bottom ring of cans with clear nail polish.
For Dull Faucets, Try Toothpaste
The fine abrasives in non-gel toothpastes make them ideal for shining up chrome faucets and fixtures.
For Stains in the Tub, Try Salted Grapefruit
Citric acid cuts through soapy buildup, and salt provides extra scouring power. Just cut a grapefruit in half and load it up with table salt, then get scrubbing. (A lemon will work, too, but a grapefruit's larger size makes it easy to cover more surface area.)