He means some of these http://www.ebay.co.uk/itm/50-x-1g-Packets-of-Silica-Gel-Sachets-Desiccant-Pouches-O127-/400682141175?pt=UK_Packaging_Materials&hash=item5d4a8445f7Silica Gel packs that should absorb the moisture stopping the condensation providing there isn't a major leak.