Passenger staterooms have largely deteriorated because they were framed in perishable softwoods such as pine, leaving hanging electrical wire, light fixtures and debris interspersed with more durable items like brass bed frames, light fixtures, and marble-topped washstands. Woodwork with attachments like doorknobs, drawer-pulls or push-plates have survived in better condition because of the small electric charge emitted by metal which repels fish and other organisms. Hardwoods like teak and mahogany, the material for most stateroom furnishings, are more resistant to decay.