I've had my machine for a couple of years and noticed yesterday's wash was covered in little grey specks. When I looked closer they were like slurry. I rinsed everything another two times and they came out clean. But, when I looked closely at the the rubber seal around the washing machine and ran a cloth inside, it came out covered in grey sludge. I've done a boil wash and it was still there.
I've wiped out as much as I can but does anyone have any tips on how to get rid for good?