To ensure the smooth running of your household, always make sure you empty your offspring's lunch-boxes at the START of the school holidays.
Failure to do so may result in:

1) a 3/4 eaten sandwich looking like something out of a laboratory experiment that has gone hideously wrong.
2) A smell in the lunchbox that is impossible to eradicate.
3) Awkward questions about what your offspring are actually eating for lunch, if they haven't eaten your perfectly good sandwich.

This handy tip is bought to you by A. Very. Bad. Mother.
Feel free to reign hell down on my housekeeping skills, or soothe me with your tales of domestic shortcomings.

Image from We Heart It.  Sadly for my offspring, their lunchboxes have never looked remotely like this .