Malnourishment Or Plain Lazy To Remember?

I am talking about my Cambodian maid. I just can't believe her forgetfulness. I wonder if her terribly poor memory resulted from malnourishment as a child in Cambodia or she's just plain lazy to remember things. I have lost count on the number of times she has forgotten to close the kettle cover after pouring hot water into the kettle. In my house, after the water is boiled using the electric kettle, the hot water will be poured into another kettle for it to cool down. From day one till today, she has forgotten to close the kettle cover - twice a day. Last night, she left the kettle uncovered and water exposed throughout the night. This morning when she woke up, this blur sotong did not even notice that she did not close the cover until I saw it and reprimanded her for her forgetfulness. From today onwards, I am going to list down the number of times she forgets things and will threaten to show the list to the maid agent, which I will. I hope this will bring her presence of mind back and make her buckle up.