This can vary depending on a number of factors: how dirty the floor is, steam output setting being used, flooring material, which type of cloth being used. Generally, a new cloth should be used for each room when using your steam mop. If you notice excessive moisture or dirty/cloudy streaks in just-cleaned areas, you may need to change the cloth sooner. Use a dry towel or rag to clean up extra moisture if needed.
Models: STEVA+ STP010 / STEAM+ SMP010 / STEAM FLR SMP002