Tetleysmooth

When I bought my CR-V, the rear wash did not deliver water to the rear screen. The wiper works fine. I set about it one day and pulled the screenwash through by suction. I reconnected the washer pipe and it produced a lovely jet down the rear screen. I tried it a few times in the following days and it was great. However, with the dry spell we're having at the moment, I haven't had to use the rear wash. I tried it again a few days ago as the rear screen was a bit dusty, and nothing, just an occasional drip. Can anyone give me an idea why the screenwash keeps disappearing and will not pump up again please? It's very annoying rather than life threatening. Thanks in advance.

Hi everyone. What is the correct grade of oil for a high mileage (175 k) 2.0 litre petrol? Thanks in advance.