Well set my system up , I live in a bungalow so i thought would try my house first. All my windows have 2 windows across the top and one large window at the bottom. As i watch them start to dry and can see quite a few dried run marks along the top of the big lower windows. I know its my first time and i need all the help i can get on what i am doing wrong. If i were a customer i would,nt want my windows left like that.