depends on the customer!is it a good paying one?well priced?does she always find fault with something every time you clean?is it near some other work that your cleaning the next day?.
if its a good well priced customer and im near to her during the next days work then i probably would esp if i thought i could of missed the bird muck when i cleaned them.if shes always moaning about something and always wants a pound of flesh with every clean then i would say sorry im too busy to come back and a cant go doing that to all my customers if a bird comes along a few days after the clean.
regularly in the summers months ive gone round collecting and some birds cacked on the living room/bedroom window after ive cleaned! :

::)IT STAYS THERE UNTIL IM NEXT ROUND AGAIN!!
