Cleaned a huge house last month , and i mean huge, i said £70 a month [ bearing in mind £35 for the one pictured on this thread ] the frames where filthy although the glass was ok ,he had a regular windy that didn't do the frames thats why he wanted to change. I thought do him 1st clean for price of a regular keep him sweet, nice little earner.
Took absolute ages and about 400litres used, got it looking great, guess what !! he's gone back to his old windy
.
As a 1 off i would have charged £150 at least. So now i charge more for 1st cleans