Hi

My Mazda 2 rear window wiper spray nozzle is not working any advise on how to fix it? When I try to use it I can hear the sound of the pump working but no water comes out?
I have tried poking a needle in the nozzle but did not fix it.
Considering buying a new nozzle and installing it but not sure how to remove the brake light panel on the book lid where the rear nozzle is? Do I just use some force or do I risk damaging the plastic panel?

Also when I start the car and just after changing gears (2nd and 3rd) and start to accelerate I hear a short squeaking noise for a second and then it goes away? I think my serpentine belt needs replacing but if that was causing the squeaking would it not squeak all the time?

Any help or advice would be appreciated. Thank you