So, I was cleaning these three little openers the other day, and it turns out one wasn't closed/locked properly - window fell open inwards as soon as I touched it with the brush and there was the sound of something being hit, then a seconds silence then an almighty smashhhh.... Turns out (according to the home-owner) it was a royal doulton bowl and about 70 or 80 years old, and worth about £300.. I posted a note through saying what'd happened and apologised, we're going to see if they'll accept half the money as it wasnt my fault, there's nothing I could have done different and they did know the windows were going to be cleaned, they were in when we started but went out as we were doing the job. And if the wind had blown hard or a bird had hit the window, same thing would have happened. Short of checking every window before I clean it I cant see what I could have done different. Sods law tho, they'd even said dont worry about those three as they're hard to get but being the nice people we are we said no, no, we'll drive round to next doors driveway and get them from there, and they were very pleased. Until they got home and saw the note.. What do you guys think?