No Thanks go@away wrote:
I've just had a double glazed door fitted.
It has a couple of finger prints and what looks like a bit of mastic stuck
on the inside between the 2 sheets of glass.
I probably wouldn't have noticed them if I wasn't cleaning the glass and
removing all the wee bits of cut upvc.

I thought the chances of this happening were slim as they would be made up
in some controlled area, or is that just wishful thinking?

Controlled area, but still made by monkeys making minimum peanuts.

Would it be reasonable to complain about this as it isn't noticeable until
you look closer?

Yes!