I know this question has probably been asked hundreds of times, but what do you lot tend to have your flow rate on? up until recently i have tended to change from a lowish rate of about 20(on the pure freedom trolley) to about 50. low rate is ok on hydrophilic glass, but on hydrophobic dont think its enough. think ive got that the right way round..lol! anyway, ive decided to keep it on the higher flow, and i think im getting better results. p.s. dont use the trolley anymore.bought a backpack and find it a lot better.wished id have bought 2 at the start instead of the trolley. so is it highish for you lot or low? forgot to mention i have the setting on 3 or 4 on the backpack.