Jeff Liebermann wrote in
:

Much depends on the device causing the problem. It's often cheaper
and easier to just buy the owner a new device instead of trying to fix
it. I've done that a few times with Chinese junk that never had a
prayer of meeting FCC Part 15 incidental radiation limits.

That could work. I agree, the price of the widget and a bit of diplomacy
might go further than any other effort. If it becomes a problem I'll try
that.