Our nanny of three years is about to go on mat leave (a few weeks to go) and seems to have lost all attention to detail. I have come home multiple times to find the potty not emptied, clothes crumpled rather than folded, nanny diary unwritten (important to us as we do not often overlap for long), even the front door unlocked with everybody upstairs. Other times I have come home early to find her shouting at the toddler. Very often I get home at 6.30 with both kids in PJs in bed, which seems too early to me. Last night there was a little overtime (just under an hour), I came home to find her texting on the sofa. The house was superficially tidy but I have found this morning clothes unwearable because they were crumpled on a chair and had been sat upon, plastic bibs greasy from last night, washed pants left soaking wet by the sink... Each in itself a little thing (though not the unlocked door and the shouting) but together v irritating, esp as we are paying a good salary, good benefits and are going out of our way to make life easy for her (eg very long overlap period with maternity cover so that she does not get overtired in the last month). I have mentioned these things as they happened in a low key way but now I feel it is the time for a sterner chat (verbal warning.?). How would you approach it?