When it comes to surface dust, a swiffer will do wonders. For aged-on greasy stuff, it's better to let sleeping dogs lie. "a little windex" might very well remove silk-screened lettering on age old faceplates. Been there done that.
Just a thought on first impressions, items for sale....and your thoughts.
When looking at a used car, the owner having it clean and looking its best is mostly what my experience has been. The same is true with buying a home. That said, I am somewhat surprised that her and on other sites like ebay, there are components that are dusty/dirty, finger printed and basicly not ready for prime time. Your thoughts?