Hello Ive just been cleaning some PVC window frames and sills that where filthy on a 1st clean. Ideally I would have liked to get them completely clean and maybe even a bit glossy looking, but i had to make do with a "surface clean"- removing the dirt that had built up but personally i wouldnt have been happy with them if id paid for it. I realised it was going to take me a long time otherwise. Do you guys get them spotless on a 1st clean? If so what do you use?