why is everything so clean?

[Scott1768]

In the 24th century, Roomba is a major Starfleet contractor. Thus, the ultra-clean appearance.

 

[T'Girl]

Roomba is a major Starfleet contractor

This would explain the shape of the saucer section.

 

[Showdown]

Starfleet's clean and shiny look has often been contrasted with with the used technology of Star Wars and other sci fi universes. Though I think it makes sense that a combination of a sealed environment, automatic cleaning technology and a little human elbow grease keeps the ships very clean.

In sci fi cleanliness often means establishment and used and old technology means anti-establishment, Compare the Alliance ships to Serenity in Firefly.

True. The Death Star was as clean as Federation ships.

 

[CaptainStoner]

Aside from dirt, everybody's quarters are always so neat and spare. NObody's messy, or a packrat?

I recall Picard having a messy desk in one of the movies.

And I think he may have found a little dust on the Ent-D bridge plaque in that last negotiation with the Sheliak.

 

[CoveTom]

They frequently collect all the dirt and grime, as well as a healthy supply of rocks, and put it behind panels in each of the consoles so that it can spray out during attacks.

 

[captcalhoun]

you know, that'd be a funny little thing to do once. have someone walking through their quarters, trip and look down and there's a robo-vac on the floor...