All god points.
Cranky, I did use the dryer sheet on the powder chamber. Maybe I should try it on the body as well.
Sport, I will try repositioning the slides as you say. Interesting theory.
Mike, my light is far enough from the scale, but that's not what I'm having the problem with. The scale is reading true, it is definitely the charge that is fluctuating.
Daboon, good points as well, but my problem isn't changes in the charge from session to session, it is major changes during each session.
I will try a few of these ideas out today and tomorrow.