I booked an internal window clean. He also did the external ones for me, as my house is a 3 storey town house so my normal window cleaner doesn't do the top floor. He used a pure water pole system thing. He warned me it would leave a few droplet marks on the external ones, which should resolve with the second clean? But he has left quite a few streaks and lint on the internal ones too. I'm not impressed really. Advise needed please! I feel he should have done the external ones twice if that is indeed what it takes to get them clean without droplet marks rather than making me wait until the next clean in a months time. And as for the internal ones it looks like I have done them (and a prof window cleaner I am not).