HELP! How on earth do I get the tile & plaster dust out of all my possessions after the builders have been in? I was naive enough to think that boxes & clothes bags would do the trick. Literally everything I own is coated in a thick layer of grey dust. Luckily most of the furniture was given away first, but I need to get my sofa (washable covers, phew!) and my grey fabric bed frame /headboard clean too. All ideas gratefully recommended inc tools (wet/dry hoover?) as I gave never done this before.