Detergents like Windex will only work on organic material. If the
compacted dirt is stone, sand, metal, etc they won't do a thing. If
the ultrasonics won't vibrate them out you'll probably have to live
with them as you'll probably do more damage to the coin than the grit.
--- Rafael Delgado <my_errors@...
> Did a run after soaking in windex. Not much difference with
> or without soaking. The compacted dirt is probably
> non-porous and so the liquid does not penetrate to do its
> --- "bull102797@..." <bull102797@...> wrote:
> >> > Did receive my ultrasonic cleaner. My first tries
> > > were with
> > > a good old clothes detergent. But Windex did give a
> > > slightly better result. right now I am soaking in
> > > windex
> > > and zzzizitt away in a couple of hours. Let you
> > > know.
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