I'm doing a lot of reading on "first time buying a house" and one thing most websites recommend is taking a day to thoroughly clean the house, including washing all of the wals. They then suggest washing all of the walls in your house at least 4 times a year.....
I think I've washed a wall once in my life, when I lived with my ex bf. We lived in his grandmothers basements and they entire place smelled like nicotine. I started washing the walls to see if that helped, and realized that the sandy colored walls were actually white...the sand was 10 years of pipe smoke build up. EW!
So how often do you wash your walls? Do you wash different ones with different frequencies (such as bathroom, kitchen, living room, etc)