Eagleback, I clean the roof of the Monty at least 3 times per year to lessen black streaks from developing on the sides of the camper. I use a mixture of 1cup Murphy's oil soap, 1cup liquid Spic-n-Span to 2gal warm water, scrubbing with a soft/medium bristle brush purchased at Wal-Mart in the RV section. I have been using this method for 10+ years on EPDM roofs with great success and no adverse effects to the roof material. There will be some staining that will not come clean such as the staining from the AC runoff but most all other dirt comes clean. You will never be able to get the roof material to look brand new but it will clean up very nicely. After cleaning the roof you may as well plan on doing an entire wash job since the runoff from the roof will streak on the sides, front and rear of the coach. Tim
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