Is it a rubber roof? Do you have the original manufacturer's warranty which usually has instructions on how to care for the roof?
A rubber roof is meant to 'breathe' so following the manufacturer's recommendations is preferable.
As to when to use a cleaner, conditioner, we used the manufacturer's recommendation of cleaning and nourishing the roof once a year.
If it's a fiberglass roof, cleaning is all that is necessary.
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2015 Dynamax REV 24TB class C
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