We only scrub walls before painting, though I spot-clean as needed. We had to scrub down the walls when we cleaned out my brother's apartment. I tried that Mr Clean Eraser - it really does an amazing job getting those scuff marks off. Still haven't gotten around to using one here though - I'm like Jane, never get the urge to scrub for no reason...I'd rather be here at BWS.
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When you don't like a thing, change it.
If you can't change it, change the way you think about it.

(Maya Angelou)