I have one customer, modern large bungalow. They're not short of money either but to be honest they live like pigs, literally!!!
The house inside is disgusting & they both never have a fAg out of their mouths. They brought 2 girls up in this too.
Anyway, the windows inside, as you can imagine are also disgusting, it's only because it pays really well that I do it. I have to make it my last job when I do the insides as my water & equipment are black after!!
I used to have to do them 2 to 3 times each to get them right but last time I did it as I described above & it was so much better. I think the soaking made a big difference.