Wet your hands with clean, running water (warm or cold), turn off the tap, and apply soap.
Lather your hands by rubbing them together with the soap. Lather the backs of your hands, between your fingers, and under your nails.
Scrub your hands for at least 20 seconds. Need a timer? Hum the “Happy Birthday” song from beginning to end twice.
Rinse your hands well under clean, running water.
Dry your hands using a clean towel or air dry them.
Before, during, and after preparing food
Before eating food
Before and after caring for someone at home who is sick with vomiting or diarrhea
Before and after treating a cut or wound
After using the toilet
After blowing your nose, coughing, or sneezing
After touching an animal, animal feed, or animal waste
After handling pet food or pet treats
After touching garbage
Source: ZDnet (Note: Click through to the article to also see what NOT to use.)
Microfiber cloth: To reduce the risk of scratching your screen, use a damp microfiber cloth rather than paper towels. The cloth won't kill bacteria but will shift it away from your mobile device.
Technology cleaners: There are specific cleaning products available for electronics and screens which will kill bugs and shouldn't leave any streaks.
Nooks and crannies: Use damp cotton swabs to clear up any awkward spots, such as headphone jacks or memory card slots.
UV lights: For a serious clean, products including PhoneSoap will use UV to flash and kill microscopic bacteria.
Antibacterial wipes: There's no harm in using a wipe every so often, especially if you've recently suffered from illness, but this should be an occasional clean as they may contain harmful chemicals.