iRobot Braava 240 Nozzle

My iRobot BraavaJet 240 floor washer clogged.  The nozzle that sprays just dripped, so I went online to look for a fix, only to discover there's no way to unclog the nozzle or get a new one (assuming you discount Chinese sellers at 70-110$US for a 2 cent part).

Somewhat frustrated, I set about creating a practical print with no idea if it would actually work.  After some experimentation, I managed to get two sub 0.4mm diameter cones to compress water from a 3mm pipe into a near identical pattern to the original nozzle.  3D printing for the win.

This particular model needs to be printed face down, and on a 0.25mm nozzle (for the nozzle), just so there's enough precision for this very delicate component.  If you can't manage that resolution, then a 0.4mm drill bit to open up closed holes will probably work, as the jet cone does expand to 3mm inside.  I've also added a .3mf with supports - you want enough structure for the main parts, but obviously need to keep the water pipe completely clear of material, so build plate-only is best.

Jump over to iFixIt if you need to work out how to open the BraavaJet and get at the old nozzle.  I've provided some orientation photos so you can appreciate what's actually going on, and why it works.  The blue component is the original, and the rougher looking red one my replacement.

I can't believe that a 300$US robot is made obsolete by such a small part.  But equally, I can't believe a practical print actually managed to pull off a fix for this minute piece of physics.