Application process: Wet and soak solvent nozzles. Applicable models: 4-color, 5-color, 6-color, 8-color, 9-color, 10-color, 12-color desktop inkjet printers. Product use: Cleans the nozzle (print head) of inkjet printers to improve ink flow and protect print heads, helping extend printer life. Specific application: Effectively clears most nozzle clogs and print interruptions caused by various factors. Simple and easy to use, non-damaging to nozzles, with results typically seen within minutes. Net content: 100ml Cleaning steps: 1) Press the ink drop button to initiate cartridge replacement; the carriage will move to the replacement position. Unplug the power cord. 2) Open the printer cover and remove the ink cartridges. 3) Use a syringe to draw a small amount of cleaning fluid from the bottle. 4) Attach the small rubber tube from the syringe to the ink outlet in the carriage. 5) Inject 1–2ml of cleaning fluid into the ink outlet. 6) Repeat this process for each ink outlet individually. 7) With the power off, reinstall the ink cartridges, close the carriage cover, and let the printer sit for 2–3 hours (depending on the severity of clogging). Keep the power disconnected during this time. 8) After 2–3 hours, restore power and run a nozzle cleaning cycle. 9) For maintenance, clean the ink outlets at least once every 1 to 2 months to help extend printer life. Package includes: 1 x Cleaning fluid (100ml) 1 x Needle tube