I always put jobs off on the car, Herbie always likes to complicate things.
My front washers haven't worked in about 3 months, so I decided it'll be a 15 minute job to fix. The pump worked, but nothing came out. (Yes, there was water in it.

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I take the pump off and instantly see the problem, it's all gunked up. I try to take the rear pump off and it snaps clean in half. (The rear has never worked and I can't see much out of the rear window anyway.) I clean the front pump, put it back on and nothing comes out. Take the pump back off, because of the rear pump, I figured out that it's separable, inside it's immaculate.
Maybe, theres a weird airblock or something? I don't wanna put everything back together, because once the washer pipe is on the bottle it isn't coming back off. I had to cut it off both times. The pump inlet is roughly the same size as a 500ml Dr Pepper bottle, which weirdly I had in my car. The pump inlet is usually vertical, with the bottle on top I make it horizontal. I get someone to try the washers and it fires water everywhere.
Put it all back together and it works beautifully. I did less damage to the rear pump then I thought, it went back together minus a few clips.