We have a home help come once every two weeks. Cleans shower. toilet, floors and vacuums carpets.

Not usually around, but the other day I was - her vacuuming is completely random - the thought of a chook scratching came to my mind, and i had to leave the room!

If I do it [ which I do every other week]  work to a systematic pattern, Similar to maybe harrowing a field, back and forth, no areas missed.

Just curious as to others methods?