Don't eat off the floor

I swept my studio today. The first time in 3 months.
Then I made a collage of it.
It was gross. But, it's not like I eat off it, right? Or set anything on it. I use tables.

Which brings me to the question: should a studio be clean? Does it matter, if no one else sees it? Or is it one of those fungshua things, that you work better in order?

Are you a clean or dirty studio type?