Hello my fellow glass lovers! Has anyone got any tips for cleaning sills on non-ground floor windows? Because you can't actually see if loads of crud has ran out the sill seal I'm worried out results. I use a sill brush, but in my experience you can clean it all nice, then 5 seconds later stuff runs out, and it would seem endless rising doesnt always help. I was thinking about putting a dry cloth over the brush at the end and just wiping them over?? Any ideas / tips? Cheers Jason.