Also one should be careful to check the tallit katan beforehand, and in this also his wife should help him in the mitzvah, that she should be careful to check the tallit katan when she summons the clothes for her husband to change them, and she should be careful likewise the separate the strings because due to washing they will certainly be tangled, and then she will get reward for the mitzvah to save her husband from a prohibition, because sometimes a man is panicked to don clothes and does not check. But nonetheless he should not rely on his wife, but check and afterwards say the berakhah.