rear screen wash stopped working on 307 1.6 52 plate?

1. My rear screen wash has stopped working when I turn the knob to activate, the wiper goes but no screen wash is dispensed, but the front screenwash works by that motion instead?

2. Also when I try to shut the boot it doesn't always shut properly and you hear a catch like noise, There has been dogs and sand from the beach in the boot. I have tried to clean the catch and spray with wd40, but still doing it! Any Ideas please. thank you