The best time to clean your windows is when...

When I woke up today and looked outside, it looked kinda rainy.. Weird, yesterday was such a sunny day!
As I went out later, it looked good again as well, what a luck, huh?
But when I came back home again and looked through my windows, it seems that the weather suddenly turned raining mode on again.

I was curious...
Went out...
Sunny...
Went in...
Opened the window....
Sunny..
-> Window dirty as fuck. NEED to clean it. LOL