Hi. My window cleaner disappeared maybe a year ago, I did a couple of cleans myself but the result was streaky and blurry and looked worse to be honest. Now they are horrendous. I was using a window spray from Tesco, but years ago I used to use warm water and vinegar. What do people recommend as I'm doing it today but want a good job as it's a real effort! For outside should I use something like washing up liquid? Thank you and sorry for the boring thread.