done a conservatory today, sunday nice and quiet. going great guns only had a small bit to do when my backpack stopped. **** I thought, luckily he had a hosepipe, scrubbed with virosol with wfp brush, rinsed with his hosepipe. what a relief. then to my disbelief my backpack started to work. always charge backpack up, im going to get one of them conny cleaning pole and brushes you attach to a hosepipe, emergency backup. great jobs when all goes right and the customer is happy with your work. ill have to get some decent upvc cream to apply onto frames for a good shine. any decent creams I can get. or spray on and wipe down.