A curious thing happened a couple times this weekend. I've been busy sculpting roadbed contours and sanding wood ties. The subsequent dust left over has forced me to vaccum the layout several times. Oddly enough whenever I've run the vaccum over the areas of completed track work something interesting happens...the power is still there...however the locos do not respond. No electrical short, cab seemingly works fine, just no power to the locos. The only thing I can guess is that my mighty Shop Vac is producing a considerable amount of static electricity when run over the tracks. The static buildup seemingly interferes with communications to the decoders in the locos. The remedy is simple...power off and then back on again which I assume releases the static charge from the tracks. It happened twice before I clued into what might be going on. Thus whenever I've vaccumed since, I've cut power to the tracks just incase too much build-up causes a decoder to go blooey or something worse. So far the problem has not re-occured since adopting this practice. I wonder if anyone else has encountered this before and if it's cost them in the end? I hope I haven't done any long term damage to any of my DCC components.