At the moment I am deeply ashamed of mine - it's almost criminal to put anything that you'd eat off to dry on it. That's not to say that I do not give it a rinse everday but the limescale and grunge just keep building up!
I have the plastic kind but wonder if stainless steel or chrome ones would be less prone to build up (ie perhaps some surfaces allow greater adherence of grunge
)
Will def bin the current one but if anyone has a good one to recommend I'd be grateful. Also, maintenance tips might be handy.