my husband would wear them until they were so gray they could be seen beneath his white shirts
I taught him how to hand-wash them
the reason I refuse to wash them is because he is capable of washing them, but would not only because he does not care – if he did not have the five minutes, or was truly incapable of doing it, then I would – but I won’t induldge his laziness and consequent wearing of gross dirty tzitzis just because he does not care
his penalty for wearing dirty tzitzis is no kneidlach on shabbos – I’ll serve luchshen with the soup, but if he wants me to roll kneidlach in the kitchen, he better be roll his tzitzis in the sink
[Telegrok here peeking over wife’s shoulder – I have a mesorah to not wash my tzitzis, it was a groise minhag in the dorm when I was a bochur)