Where vents are concerned, some I do, and some I avoid.
I think you get to know the ones that will cause you problems.
On a first time clean I will always try and do ABOVE the vents, I've developed a decent technique now and cope just fine.
If the vents are dirty I'll go back to them after gravity has done it's work and lightly re-clean the glass.
As we gain experience, we all develop little changes in technique that suit US personally, and we will all swear by our methods.
UPVC windows often oxidise, I personally cope just fine with them now.
Rog has had a problem with some patio doors that are aluminium, it doesn't necessarily mean the problem is the aluminium, it can also be the type of rubber seals that the window panes are held in place with, particularly on older aluminium windows.
Squeaks is learning fast though, but he's still got further to go than he realises!!
One tip I passed onto him (that he's ignored so far) is to have his microbore hose clipped in some fashion to his waist, to say this makes life easier is an understatement.
Because he's stripped the thread on his brush, he is treating the brush like fragile bone china
I've tried to tell him how to connect up his lightweight gooseneck with the existing brush he is using...to no avail!
Not that he needs to use the gooseneck as such at the moment, but it's a bloody useful tool
He keeps getting an airlock that prevents the pump from working, this isn't the fault of the pump, but rather a combination af how is system is setup.
Clearing the airlock isn't hard, but he could make it easier for himself, (can't be bothered to explain how!)and he'll have to do it eventually...
He's a stuborn old bugger though...seems he is determined to learn by experience and not by advice!
But already he has started turning over (with less physical effort) virtually the same as he was doing trad, and even on first time cleans he is also beginning to get decent results...whats he going to be like in 5 or 6 weeks time?
some things he has struggled with, leaking windows and so on, but changing his technique may well negate that problem, in fact Squeaks has had more problems with leaks in one day than I have had in 3 years!!!!
Gotta go!
Taxi time

Ian