Call the Roof Manufacture
Hi had dark strips on at the seems of my roof. I called the roof manufacture and they assured me everything was okay and recommended cleaning it. I asked about using Dawn dish soap and they said that it could be used. I also asked about 'Wet and Forget', they didn't have any information on it but didn't think it would cause any issues with the membrane. After washing my roof and spraying on the Wet and Forget, my roof looks great.
My recommendation, review the manufactures FAQ found on their website and call them.
Good Luck
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John Cincinnati, Ohio
2020 Passport 3100QB
2022 Silverado 4x4 2500 HD
6.6 Duramax Diesel
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