I live in a dusty area and I can't get used to having to mop the slate on the roof periodically or it gets clogged. If it were only dust, but birds also take part in the process of devaluing the beauty of my slate. Eh, well that's alright I hope they will one day choose a better place for themselves, though I am not entitled to judge nature. I just want to look decent in front of my neighbours, so I don't feel ashamed in front of my parents and my friends don't allow themselves to make jokes about the roof. Well, I'm sure you know firsthand that when people have had a few drinks they can afford to be excessive. I won't be offended, of course, but a wife can get depressed for a short period of time, a depressive episode. I'm still wondering how I can speed up the process of cleaning up the whole site.