the cat likes to play in water lol/ whoever owns the hand washable socks, ask him/her to wash his/her own socks in his/her own sink, in the bedroom with the door closed. Personally, I would not be hand washing anyones socks, nor underwear lol...
I now realise that hand washing is futile unless the cat is locked away. Just discovered a sock under the sofa bed, a trail/river of water from the kitchen sink to the sofa bed and a cat very pleased with his fishing expedition ;0) (Twice) For the avoidance of doubt it is not me that owns socks that require hand washing...