Pressure from the windscreen washers is down to a dribble, despite my having cleaned and tested the (now) 'as-new' jet housings. This problem has been addressed many times on this Forum and The Other Place, I know, but all the 'remedies' seem to revolve around variations on 'removing and cleaning the washer jets' (done that) or 'removing the washer bottle' (how?)or 'removing the washer motor' (double-how) or 'removing the scuttle panel' after 'removing the wipers'. Apart from the first of these, which is easily done as the jet housings just snap out with a bit of leverage from a flat blade screwdriver, the others need skilled methods which are far from clear, as you can't see what you're doing. No-one seems to be offering up their experience or step-by-step guide with pics. Or am I missing the correct search terms?
Essentially, the washer bottle is of a weird shape which might have been 'poured' into the available space, sitting, as it does, underneath the coolant header tank and moulding the shape of the wheel arch and other obstructions. There is no way to 'wriggle' it free and give it a good clean out. You can only just see the small blue filler cap and the rest of the bottle snakes away out of sight - certainly it doesn't let you see what might be fixing it in place, or present itself as being designed to be removable.
Some say that the offside wheel and the wheel-arch liner needs to be removed for access. Some say that the coolant header tank needs to be removed. I'm not going down these routes, which have "DANGER! You'll do more harm than good" or "Take a small problem and end up with one or more bigger ones" written all over them.
Let's examine the problem. The formerly perky and enthusiastic multi-jet windscreen (not h/lights or rear) washer streams have radically gone down in pressure over time. I've removed the jet fittings and blown them clear with compressed air and tested the result after de-gungeing with pressure from a hose. They work great, off the car, with eight strong jets. But this is off the car. With the jets removed, activating the washer motor produces a healthy hum but the dribble out of the open ends of the two pipes is truly pathetic.
Make some domestic comparisons here - hard water, kettle, furred-up shower head - what do we do? Fill with hot water and some de-scaling fluid - much fizzing, then problem solved. I'm minded to try the same on the washer bottle and pump the chemical through the lines. Thing is, if the problem is due to gunge rather than limescale, I'll be no better off.
So here's my questions: has anyone actually gone down the route of removing a complete washer reservoir bottle? And if so, what method did they use? And what did they find? Was it all furred up with limescale or blocked up with general filth/gunge/algae etc?