I've got some sash windows where the bottom half isn't just painted-in,
it was never designed to open. The problem is how do you clean the
outside glass, because when you open the top half those panes are
covered up - so you can't clean from the inside of the house.

They are also on the 2nd floor (UK parlance) and somewhat out of reach
of ladders. Is there a cunning gadget I can get to solve this?
--
Roland Perry