Biofilm formers have the LOVE OF IRON. They strongly adsorb to it and
one can use eddycurrent to strip them off.
When I read Nahanton's post on turbinate radioablation I thought
"ALRIGHT,  RF stripping for people! " Now if I can just get treated
and have my brother and sons threated before they go out of business.
"
What disturbs me is that they are not offering any new units for
sale.
I gather that it was not really all that successful for treating
people with soft pallets that collapsed into their airways, but it
DOES seem to be really effective
at reducing the size of swollen turbinates.

Alternating currents do not flow through a conductor uniformly; the
higher the frequency the more the current is confined to the surface.
When using eddy current to inspect a brazement, or diffusion-bonded
joint, one scans through a succession of frequencies, attenuation at a
lower frequency indicating a problem farther under the surface,
attenuation at high frequencies near or on the surface.
RF frequency currents "skin", that is that they tend to travel right
on the surface. At 1.8 Gig no matter how deep they put the needle the
current is primarily going to try to flow on the surface. Which means
that it is going cook a layer on the surrounding surface probably a
couple of microns thick. Just how the energy  is distributed over the
depth wise and over the surface from the point of origin at the needle
to the ground would be interesting to investigate, it will depend
where the ground is attached among other things.

Evidently this frequency is high enough to cook the little bugs in the
goo, which seem to be heat sensitive anyway,  without cooking the base
of the much bigger cilia underneath, so they can recover.  I bet this
thing has not really been optimized to get rid of bacteria rather than
create a gross lesion, I know that they are useful in reducing
hyperatrophy, but I think it might be also be possible to use a
different shaped lead and get rid of the bacteria without creating a
gross lesion.