Ok ive had a ladder up to clean the mildew off the roof today,which has been annoying me for sometime as the motorhome is new and obviosly sat on the forecourt for an age.I did ask them to clean it when it went back for some bits i wasnt happy with.The stuff i bought for cleaning was ace however didnt want to remove the black streaks without plenty of elbow grease.Ive also bought a coating to cover it in but want shot of the streaks 1st.So apart from the black streak remover ive seen,what else do you use?All suggestions would be gratefully welcomed.By the way i started off cleaning with one of those mit things but soon reverted to the soft brush.