I've had mine for 8 months and haven't replaced pads yet. You just throw them in the wash afetr you are done and they slean beutifully. I think the reason they would need to be replaces is becasue of the velcro on the botton that holds the pad to the steamer.
I LOVE my Haan - it is fabulous and leaves little water on the floor after - my kitchen is usually dry by the time I begin on the dining room