I am not sure if this is posted anyplace but I wanted to share this trick I discovered.

You can clean display cakes really well with the "duster" that you get in a can for cleaning electronics. I think you might be able to get it at Staples and I only know electronic places but maybe Best Buy might have it.
I keep a display cake in my office (for sanity's sake) at my tech job..
I noticed it as really dusty and gross looking so I took some duster and just dusted it off and it's beautiful and looks new again!! Nothing blew off and there isn't a speck of dust left. (caution it's a high pressure spray)

Hope that helps!

Thanks, I never thought of that!