Preventing the Spread of COVID-19 on Mobile Devices

Testing Suggests CleanSlate UV Can Kill SARS-CoV-2 and Help Prevent Spread of COVID-19 on Cell Phones

CleanSlate UV was founded in 2014 to ensure that mobile devices are germ-free. Our team is committed to creating simple, fast and effective solutions that kill germs on cell phones without damaging sensitive touchscreens.

Since early March, CleanSlate UV has been working to determine specific kill rates against SARS-CoV-2, the virus that causes COVID-19. This is critical information for our healthcare, hospitality and corporate partners worldwide.


Recent testing produces a 99.979% kill rate suggesting CleanSlate UV can kill the novel coronavirus (COVID-19) in just 20 seconds on smartphones, tablets and other non-porous surfaces.

This testing was conducted on the MS2 bacteriophage, a virus known to be more resistant to disinfectants than viruses such as SARS-CoV-21.

Commercial laboratories are extremely limited in their ability to perform environmental testing with SARS-CoV-2, so a surrogate virus must be used. In addition to performing testing with MS2 bacteriophage, we are also in the process of testing the efficacy of the CleanSlate against another strain of human coronavirus, which is similar to SARS-CoV-2.

We plan to have additional data on human coronavirus in the coming weeks. It is likely that this will result in a higher kill rate claim for SARS-CoV-2. Until those results are available, CleanSlate UV is confident in a kill rate claim of 99.979% against SARS-CoV-2.

To discuss how CleanSlate UV can help keep your staff, customers and visitors safe, or for a copy of the testing report, please get in touch.


Want to learn about MS2 and how it relates to COVID-19 and SARS-CoV-2? See Q&A below.

Scientific Questions and Answers on SARS-CoV-2 and MS2

What is MS2?

Many of us are familiar with viruses that commonly make people sick such as norovirus, influenza and the hepatitis C virus, but, unless you are a microbiologist, you probably haven’t heard of MS2 bacteriophage.Don’t fret, MS2 is not actually a human pathogen, it infects and kills E. coli. What does this have to do with COVID-19? Well, MS2 is commonly used as a surrogate for human viral pathogens such as norovirus and human coronaviruses (i.e. SARS-CoV-2).

What is a surrogate?

A surrogate is a substitute organism that is used in disinfection efficacy tests as it behaves similarly to the pathogen of interest. Surrogate organisms can be worked with in the majority of microbiology laboratories as they are safer to work with than the actual pathogen. In short, surrogates such as MS2 are organisms that are non-pathogenic to humans and share biological and physical properties with the pathogen that they are intended to represent.

Why is it used as a viral screening tool?

Disinfection efficacy testing with human viruses have a reputation for being slow and costly. Largely due to the efforts needed to culture the virus with mammalian cells. MS2 is an exception to this as it is a virus that infects bacteria rather than human cells. The host that MS2 is propagated with is E. coli, which replicates very quickly enabling quick and cost-effective efficacy data.

Why can’t you test directly with SARS-CoV-2?

SARS-CoV-2 is a strain of human coronavirus that Health Canada classifies as a Risk Group 3 microorganism and consequently requires a containment level 3 laboratory for testing. Many commercial microbiology laboratories do not have level 3 containment facilities, and those that do are not able to access the novel coronavirus (SARS-CoV-2) at this time. Currently, the best that we can do is test a surrogate (substitute) organism.

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