Just picked up a Frost SS a few days ago. Im talking with Shawn and my dealer about exactly the same problem. Heres what I got so far:
Static whenever touching the pickguard between the pickups and the selector switch. Also between the selector switch and the tone knobs.
And not just a little but a very LOUD crackle but only when I drag my fingertip across the pickguard, not while i just touch it.This happens under all conditions with or without me holding
the strings with my fretting hand.
Replicated it on 2 different amps and in 2 different rooms with different guitar cables. Also replicated to day at the PRS dealer that I purchaced it.
Happens with solid state or tube amps.
Seems to get worse the longer the guitar is played.
My guitar tech could not replicate with his fingers...but i could :-0 (what does that mean lol?)
My daughter did it as well but it didnt crackle to the degree it does with me.
Ok so now figuring out what to do. Tech suggested going with full sheilding on the back of the pickguard and also the body cavity (which is left unfinished to allow the wood to breathe.
Shawn has been a great help and said they will ship it back to PRS and check it out for me (very cool)
Thing is ....what if it doesnt do it for them? If it cant be resolved (Ive never had this problem with any of my guitars and I have quite a few) then I have no choice to return it which would suck because its a freakin AWESOME guitar.
Just figured I throw out what I know about this issue so far maybe someone can figure this out.