My neighbour who stays above me like to smoke at his window. However, he flicks his ash outside of his window.
The ash will fly into my room and deposit itself in my window grill or on the floor near the area. It's a real pain to clean the ash out of my window grill spaces and off the floor. It happens a few times a day
What should I do? Just politely go up and tell him? Call HDB/Town Council?