Cleaning con roofs are gonna get the con windows dirty, so unless your a magician, your gonna have to clean the con windows aswell. So you had may aswell clean the house windows aswell.
In a nutshell... the idea is pointless!
In a nutshell ... the idea is perfectly sound.
Evidently, if the roof is grubby, so is the rest of the frame going to be, so it will need cleaning anyway.
So what if it takes ages? The next one will be a bit quicker etc.
As a part-time business it's absolutely perfect.
Matthay, I expect loads of your buddies have got conservatories. Ask them if you can clean them for free. By the time you've done 2 or 3, you'll be sufficiently expert. After all, it's not rocket science - it's cleaning!!!!!
And Rick is right about using Flash liquid. I've used it in an emergency when I didn't have TFR. It did the job - but it stank of chemical lemons!