Is your Geiger counter by any chance set to the most sensitive setting?
Sometimes, Geiger counters just beep off the charts from normal daily levels of
radioactivity. Probably a dumb question, seeing as how you have a Geiger
counter in the first place, but worth checking. Try dialing it back a bit?

-Jen
Half the people you know are below average. -Steven Wright

Now I Know what is lacking in my care of my cats.  I have never checked them
to see if they are radio active.  I don't even own a Geiger counter.

--
Barb
Of course I don't look busy,
I did it right the first time.