Right, someone see if they can help here- I use a backpack for most of my houses, but also have a van system. I've noticed that sometimes when I do a window wfp, it seems to 'soap up'- loads of bubbles like soap. Originally I thought the owner had used fairy on the windows between my cleans, then it happened on another house, and I though soap was getting on my brush- but this was impossible as my brush kept in a tube inside my van, nowhere near any soap. Today- I've figured out what it is- It's when I use my van mount. Each time this has happened, I've been using my van system. Now the bubbles clear up after a few mins, but for the first few windows, I have to go over them again as they look soapy! It must be my 100m microbore hose- Could this have a residue on the inside??? This only happens when I haven't used my van mount for a few days or weeks. Anyone got a clue? I'm baffled!