While health of FreeQs in mind, here is another one I saved a bit of from article at NaturalNews.com:
https://www.naturalnews.com/2019-03-01-handheld-electronic-devices-source-of-toxic-chemicals.html
Handheld electronic devices found to be a potential source of toxic chemicals.
These chemicals are often used either as flame retardants or plasticizers that make materials such as polyvinyl chloride more flexible and durable.
there is growing evidence linking OPEs to health problems. Scientists from the U.S., Canada, China and Norway are finding connections between exposure to OPEs and ===>>> thyroid cancer, fertility problems and impaired brain development in children.
Researchers find that BPA-free plastics still cause chromosomal abnormalities, hormone disruption
It makes a lot of sense to wipe handheld devices periodically to remove toxins found on their surfaces, more so given that children and adults constantly use them. In addition, Diamond suggests that we wash our hands frequently since washing reduces our exposure to these chemicals.
Any time people start talking toxins and/or radiation I always like to point out the main factors that drive risk:
1) Toxicity/radiation type - This is how dangerous something is, the higher the toxicity of a potential item the greater likelihood of causing harm.
2) Concentration - This is the amount the person is exposed to. The more exposure the greater likelihood of causing harm.
3) Time duration of exposure - This is the length of time a person is exposed to something in one incident. The greater time, the greater likelihood of causing harm.
4) Chronic or repeated exposure - Some toxins and all radiation can add up over time so that even small exposures that wouldn’t normally be an issue can build over time and cause problems later on down the road.
(There are some toxins which one can build an immunity through repeated minor exposure. For example: Iocaine powder from the Princess Bride :)