You need to explain your question well enough to lead to an answer. UV *is* radiation. It does not leave anything behind. And I am pretty smart but I never heard of phone soap. So what are you talking about?
I was referring to a light bulb that emits UV-C. I am trying to figure out if after the bulb is off, are the surfaces it touched safe or do they have residual radiation.
I was referring to a light bulb that emits UV-C. I am trying to figure out if after the bulb is off, are the surfaces it touched safe or do they have residual radiation.