I clean the windows on a department store
3 times a week and in the early spring the sun shines through and they look less than perfect. The sunlight is very unforgiving.
If a customer has in issue they will always tell you if your relationship with them is good.
Don't worry too much. It's got to be better than going around with a smelly bucket of water, full of dirt from off all the other houses' windows.

Oh no what have I said!
Wait for it!
