I hope you had the curtains drawn - if the neighbours saw you doing that they might fear you'd lost it.I've just attempted to do the experiment (well, a safe version thereof!) by attempting to measure the IR of the sole of the (leather-, not rubber-soled) shoes I've been wearing all day (so probably not totally dry ). I clamped sheets of metal inside and out, and got an IR of about 16 MΩ at 1000V between them.