If it really bothers you and you don't mind cleaning - or if cleaning makes you feel better - then go ahead and clean clean clean. Of course, it will get dirty again, but is your mental health more important than looking at a dirty house???
Me - I would never clean (other than keeping the dust at bay) - but it would not bother me in the least. But if it did, I'd go ahead and clean to my hearts content - because that would make me feel better and in this case, how YOU feel, is all that matters!