Here I will solve Y'alls problem. This will take out those streaks just as good as any other of the Cleaners mentioned and you can get it at any auto Parts store, Walmart, Kmart etc...
HAVE BEEN USING ZEP PURPLE CLEANER DEGREASER FOR YEARS WORKS GREAT HAVE SPRAYED ON AND RINSED BUT THE BEST IS DILUTE IN BUCKET TAKE BUCKET AND SPONGE AND HOSE UP LADDER WIPE ON RINSE OFF CAUTION WEAR GLOVES IS A FLESH EATER ZEP SELLS AT HOME DEPOT IN THIS AREA ALSO USE ON METAL FACIAS AND TRIM WET PAINTED SURFACES TO STRONG WILL LIGHTEN COLORS HOPE THIS HELPS SMELLS GOOD BUT DOES EAT FLESH