Had this exact problem today. Cleaned first floor flat. DOwnstairs flat took a strop. Tried very hard to placate her. Explained about H&S, Dried her garden seat which had gotten wet. Even bladed the bottom of her windows. (Something I never usually do) The more I did for her, the more irate she became. VERY STRANGE

One of her windows wasn't closed properly and so a (tiny) drop of water had gotten into the channel of the frame. She claimed that I was "soaking" her flat. I offered to ring her bell first next time so she could close her windows. She slammed the door on me saying she was going to call my "boss". Since I run the company, I thought this might be a laugh. 10 seconds later the call she had placed to our office was patched through to my mobile. Should have seen her face

What I would like to know is where we stand legally on this issue? If I were to ring her door and she refused to close her windows (Perhaps even opening them wide). WHat could I do? If I were to go ahead and clean the windows, soaking her flat, would we be liable for the damage? COuld she be forced to close her windows?
Any thoughts?