With respect to display, avoid putting these prints in direct sunlight. The closer they are to a window, the faster they will deteriorate.
For better protection of the image, one can go to a framer and have glass plus a spacer put into the frame. The optically coated, non-reflective glass (Like "Tru-View") may be among the better glazing solutions if reflections are a problem, which is normal in most lighting situations.
For cleaning the dye print surface, using a photographic lens "blower" is the first thing to do. I do not recommend the "canned air" approaches because they too often cause condensation on the print surface. That can leave a lasting stain. If air will not remove the dust, a soft, clean cloth is the next thing to try. Soft cotton and microfiber are the best. If the cotton leaves some lint, use the blower to remove that. No not use a damp cloth. Although the print has an acrylic spray on it, it is not waterproof.
If the print experiences pre-mature fading or color shifting (it will naturally warm with age), I will replace the print with my latest dye printing technology at cost. The dye setup I am using in 2014 may be twice as lightfast as the 2013 approach. If the image is one that you want to have as a collectible that will last many generations, carbon pigments are the best answer.