Dymo DiscPainter Repair

Protips:

Use Lexmark #1 cartridges to replace the long-obsolete Dymo cartridges.

Remove the cartridge and cover the print nozzle area with airtight tape or, in my case, paint clay-bar putty (very sticky, airtight, and fully cleans itself off after removal) - and the cartridge can last for years. The printer doesn't seem to have an airtight cartridge storage seal inside, so if you don't cap the cartridge between uses, it will rapidly dry out.