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plenty are already saying they use another brush
so there must be something to it
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probably the same people who change their resin when the tds rises to 001
but hey ho spend (waste) as much money as you like on all manner of different brushes, goosenecks, poles etc.
maybe just my opinion but this wfp lark just seems to get more and more complicated as it advances. Know what your doing and be good at it and keep it simple, aint rocket science, your cleaning a window at the end of the day