This what i do ...
I go on holiday for a week, and when i come back i am behind,... so look through your round, so the ones who have caught up whilst away, and simply do the whole area together then...
Then as a new customer calls in any of your given areas... if you clean it straight away... chances are, it will again be in the wrong order !..
and so it goes on .. until your next holiday then you can tidy it up again.