I was doing a bit of DIY and needed to remove a heating rad. When I moved the rad through the sitting room (after I thought I had drained it completely) a load of black oil-stuff came out. My carpet is now destroyed...it has long black stains all across it. At the time, I had used Vanish and some methylated spiritis but neither helped. I think I have no option now but to go buy a new carpet, the stains are that bad. Does anyone know if professional carpet cleaners can fix this kind of damage?