[dai]

I used to do tops only WFP. Since I have been doing the lot I have found the possible cause for those dirty cills.
Many PVC windows have a 3mm gap at the bottom between the cill and the frame.
This gap is open and traps all manner of dirt.
I noticed that if I let water from the jets get into this gap all sorts of rubbish flows out. If you run your brush along the cill to clean it, the dirt just flows out of this gap and leaves a trail of debrise behind it. You can go from side to side as much as you like, the dirt just keeps on coming from this gap.
The only solution is to turn off your flow for that cill wipe. If you can't do that easily. then turn your brush 90 degrees.
JUST DONT LET YOUR JETS SQUIRT INTO THAT GAP. Dai

[S_RICHARDSON]

Thanks for the advice Dai i'll have to try it out!

 

[bluesteve]

explain to the customer that it all comes out after a while and its one of the benefits of wfp, it does eventually anywhere,

[Pj]

Yes, yes, the alternative is to turn up the flow and blast it out of the recess.
It comes up good.
We clean recesses!

[seanmcshane]

on ground floors, if the gaps are full of debris, I use the customers hosepipe and blast all the stuff out....then clean as normal.

[AuRavelling79]

You can easily turn off the flow with one of Peter Fogwills autobrushes - that's what I do.

[Neil Williams]

You can easily turn off the flow with one of Peter Fogwills autobrushes - that's what I do.

Or with feed pipe in one hand bend pipe right over so flow stops.
The real key here is to have the brush at the right angle. End of bristles to sill not side of them.