I once found a piece of steel from a bra (a female friend told me what it was) in my machine, after a wash. Straight up I have no idea how it got there. Washing machines are haunted
It may be the brand of Washing powder you use could it be :-
As we all know the Tide can wash anything up and steel wire is not impossible , better watch when you go to get the clothes out John could be stinging Jellyfish next time .