A cure for those small grubby black/brown marks on laundry. I know lots of folk have this problem and it is almost certainly from an accumulation of mould in the front rubber seal of the washing machine due to the use of low temperature liquids which contain no bleaching agents. When I finally discovered the source of the problem I cleaned ot the "grooves" in rubber seal with a suitable mould killer containing sodium hypochlorite (use rubber gloves) which took about 1/2 hour and the marks vanished. HID now happy again and we will use a powder with bleaching agent in it at 60 degrees at least once a month to keep the mould at bay.