Leaving the kitchen unsupervised

Hi,

One should not leave one's kitchen unsupervised, with a non-Jewish housekeeper in the home, even if cooking is never part of the housekeeper's job. The housekeeper might innocently prepare food for herself or for the family, not realizing the problem this would cause for the kashrut of the kitchen.

One who did this may use the dishes and kitchen equipment after 24 hours have passed, if they had been unaware that doing so is prohibited.

(Rav Moshe Feinstein, Igrot Moshe Yoreh Deah 1:61)

Have a great day,
Mordechai