After converting my loft to a music room I have noticed this winter that I am getting some static problems with my guitars. I thought at first it was an earthing problem but it isn't it is definitely static. I think it may have something to do with temperature changes. When I converted my loft I had the inside of the roof coated with a 2" thick insulation foam called Roofbond. I laid down 2"thick flooring and panelled the surrounding area with tongue and grooved pine panelboards. I put in electricity but didn't extend the central heating just put an electric space heater for use in the winter. This is what is causing the problem I believe. I play in the loft during the day and if it is cold I use the heater. When I am finished after switching everything off I close the insulated loft hatch and go downstairs where at this time of year we have the central heating on. Some days especially if I have not played a specific guitar for a while I have this problem with static build up in the guitar ie extra scratchy sounds when softly stroking the strings, metal hardware . What could I do to run it to earth?. I have a jumper cable with crocodile clips I use for emptying the caps in my amp could I use this and if so what would I use to run it to earth like the chassis in an amp?.