While Singer Johnny Mathis was in the hospital, a professional window washer was at his house to clean a sky-light over the indoor pool at the Mathis's home. The window washer, a specialist in hard-to-reach windows and skylights, had cleaned the skylight many times over the years, but slipped and fell through the roof due to known hazards on the roof (slippery conditions that he had previously disclosed to the housekeeper), and sued Mathis for his injuries. 

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