I was right to worry: my washing came out dirtier than it went in.
I took it out, wiped out the machine and decided I'd better try washing the towels - which were covered in brown streaks - again.
I set it running; fifteen minutes later I noticed the laundry basket full of towels sitting next to the washing-itself machine.
Forget washing machines and hot-water-bottles: I think I have more cranially-located problems to concern me.
Harvey just came running (okay, walking hurriedly) out of the kitchen with the washing machine in hot pursuit. I shouldn't laugh ... but his face!
I shouldn't have laughed: the washing machine just flooded the kitchen.