I clean a small upper flat for £8 - 4 windows & a door every 8wks.
The trad guy that cleans the old dear below has called every 4wks & both flats got egged just after xmas.
I cleaned my flat all upvc & glass straight away & left it all imaculate.
The Trad guy has been twice before i visited again - he has left the egg,shell,yolk, poop all down the old womans window & just cleaned the glass.
Price for quality & do a proper job.