Yep, totally agree, having breaks is important...although I have to say I don't take them very often
I do have them though, but they are not regular.
Working in the rain?
Where possible yes, but I think it is a grey area, there are times when I know full well that by the time I've finished a house some of the windows are going to be mucked up as I'm collecting the money off the customer!
I'll work in a downpour on commercial stuff, shops and so on, but I am more careful on residential stuff.
I may be running a business, but we are all at the mercy of the elements, I wouldn't paint a window in the rain, or build a wall, and I wouldn't put down weedkiller!
And if I think the conditions are going to make cleaning windows a waste of time then I won't do them.
Rain alone won't much them up, but if the rain is lashing against the windows then you are asking for trouble and I think customers would be justifiably hacked off if I'm cleaning their windows in such conditions!
Ian