FujiFilm Quality Dry Photo Paper for Frontier-S DX100 Printer (Glossy, 4" x 213' Roll, 2-Pack) - Manual (Page 50)

D
Press the used ink cartridge lightly to eject it, and then remove the cartridge.
See the following for more information on disposing of ink cartridges.
U “Disposing of Used Ink Cartridges and Maintenance Cartridges” on page 20
c Important:
Removed ink cartridges may have ink around the ink supply port, so be careful not to get any ink on the
surrounding area when removing the cartridges.
Frontier-S Operation Guide
Replacing Ink Cartridges
50