When I wash the children's nappies the washer smells of poo when I open the door? I use paper liners so no poo goes in to the machine, I check the seal and there are no deposits there. Could anyone tell me what I am doing wrong, and what I can do to remedy the situation. I don't want to have to rinse the empty washer after each time. Waste of water and electricity and gets in the way of all my other 17 loads I need to do...