X2 on the Dawn dish soap to clean the roof. I clean it twice a year and have no problems with any streaking on the siding.
I also use Protect All on the siding after I wash it. I Protect All it 2 to 3 times per year. which also helps the streaking problem.
Welcome to the Forum and
2014 Jayflight 24FBS Elite
2009 F150 Supercab, 5.4L ,3.73, HD Tow Package, Equal-i-zer 1K,
Progressive EMS-LCHW30, TST 507RV TPMS, Hydro Life HL-200, Maxxis 8008.
Best friend wife and dog Cooper. RETIRED 6/30/16. WOOHOO! Now the "endless summer" begins.