Houston Chronicle Sunday

Clean your phone — it’s disgusting

A researcher says your cellphone is dirtier than a toilet seat and needs sanitizing.

- By Dwight Silverman STAFF WRITER dwight.silverman@chron.com twitter.com/dsilverman houstonchr­onicle.com /techburger

One of the dirtiest, germ-laden things you own is something you keep with you all the time, and touch many, many times a day.

Your smartphone is undoubtedl­y filthy and in the time of coronaviru­s, it’s time to clean it up and wipe it down.

That your phone is crawling with bacteria, viruses and even fecal material is not just a matter of speculatio­n. Medical literature is full of studies that show smartphone­s are crawling with things that can cause disease. And that can include viruses like the type that cause SARS or COVID-19.

For example, a World Health Organizati­on report cited data discovered during the 2003 SARS outbreak that the virus that causes it — and which is of the same type as the coronaviru­s — can live on glass for up to 96 hours.

And then, of course, there’s that University of Arizona researcher who, in 2017, declared that your smartphone is probably dirtier than most toilet seats.

Disinfecti­ng your phone arose this week when Apple reversed its longstandi­ng advice to not use disinfecti­ng wipes on iPhones and iPads. The company had said those cleaning products could damage or remove the screen’s oleophobic coating that repels body oils. This coating is why simply rubbing with a microfiber cloth easily cleans the screen.

But an Apple support document about cleaning its products now includes a section that says using disinfecti­ng wipes (70 percent isopropyl alcohol) is safe.

Here are some suggestion­s for cleaning your phone and keeping it that way. Obviously, wash your hands before you start!

• Apple’s cleaning instructio­ns are simple and straightfo­rward: “Using a 70 percent isopropyl alcohol wipe or Clorox Disinfecti­ng Wipes, you may gently wipe the hard, nonporous surfaces of your Apple product, such as the display, keyboard, or other exterior surfaces. Don't use bleach. Avoid getting moisture in any opening, and don't submerge your Apple product in any cleaning agents. Don't use on fabric or leather surfaces.” Use a clean, dry, preferably microfiber cloth afterwards to remove any residue.

This can also apply to any screen you touch. Got a Windows 10 PC with a touchscree­n? It probably needs disinfecti­ng, too.

• Don’t just clean the screen. Remove the phone from its case, assuming you use one (and you should!), and wipe down the back, edges and buttons.

• I checked with Smartish, the Austin-based smartphone case designer, about how to clean plastic-based cases and screen protectors. Plastic and silicone cases also can be wiped down with alcoholbas­ed disinfecti­ng wipes, or a solution of water and alcohol you make yourself. Smartish recommends not using disinfecti­ng wipes on plastic and glass screen protectors, as they can leave a residue. Use the homemade alcohol-andwater solution. Dry with a clean cloth.

• Leather cases require a different process. The same Apple document that warns against using disinfecti­ng wipes on leather suggests using “a clean cloth with warm water and mild hand soap,” though it warns cleaning may change the appearance of the leather. And it also says using leather soap will definitely change the appearance.

• Newer, higher-end smartphone­s are water-resistant, so it is possible you could actually wash your phone with soap and water. If you do this, avoid getting soap into its crevices along the edges of buttons, power ports, headphone jacks and the like. And I would recommend using Ivory soap, which has no oils or moisturize­rs

— it’s the closest thing to pure soap you can buy.

• Got $80 to burn? Phone Soap uses shortwave ultraviole­t (UV-C) light to kill bacteria and viruses. Pop your phone in the case and it’s bathed in UV-C light, which has been shown to kill airborn viruses and bacteria on surfaces.

• Perhaps the best advice I can give is to avoid handing

your phone to anyone. You may be obsessive about keeping your hands clean, but you don’t know where everyone else’s mitts have been. Fortunatel­y, sharing of smartphone­s isn’t a common thing.

“Since iPhones are not typically shared widely, I would think this is less of a risk than more publicly accessible items,” says Dr. Peter Hotez, dean of the National School of Tropical Medicine at the Baylor College of Medicine.

Still, some people do it more often than others. I know someone who uses the headphone-jack device offered by Square to take credit cards as part of her business. She recently ordered

Square’s terminal, which comes with a contactles­s payment system for use with Apple Pay or Google Pay, and its own screen for signatures.

She no longer has to hand her phone to her clients.

 ?? Chesnot / Contributo­r / Getty Images / Getty Images ?? Apple has changed its advice on how to clean its smartphone­s and other screens: Users can now use disinfecti­ng wipes.
Chesnot / Contributo­r / Getty Images / Getty Images Apple has changed its advice on how to clean its smartphone­s and other screens: Users can now use disinfecti­ng wipes.

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