Canon printer toner cartridges can be quite costly. The good news is that most Canon cartridges come with a refill hole, so you can save money by refilling the toner yourself. Refilling the toner in your Canon printer is a straightforward task when you have the right tools. With a toner refill kit, you can easily refill your Canon printer toner.
Steps
Check to make sure the toner cartridge is empty.

Run the print head cleaning program on your computer. Typically, when your printouts have streaks, many people assume the toner is running low. However, in some cases, the print head being dirty could be the issue. Try selecting the print head cleaning feature in the 'Devices and Printers' menu to see if this improves the situation.
- Print another page after running the print head cleaning program. If streaks still appear, it means the printer is running low on toner.

Shake the toner cartridge. If your printer alerts you that it's running low on toner, it's likely that the toner inside the cartridge is clogged. Remove each cartridge, turn it upside down, and shake it gently. Then, reinsert the cartridges and try printing again to see if the issue has been resolved.

Clean the toner cartridge sensor. A dirty sensor can cause errors even if the toner is still available, so cleaning this part can fix the issue. Dampen a paper towel with some rubbing alcohol and gently wipe the sensor on the cartridge, then print again to check if the problem persists.
Prepare the toner cartridge

Prepare the Canon toner refill kit. These kits typically include toner for all the printer's colors, a syringe for refilling, and a small drill bit. You can purchase them from most office supply stores or online.
- Contact Canon directly if you can't find the right tools. Visit https://www.usa.canon.com/internet/portal/us/home/support/self-help-center/contact-us-by-phone for contact numbers.
- Note: Each printer model requires its own specific refill kit. While Canon toner products look similar, they are not always interchangeable.

Remove the toner cartridge. Some printers have a specific mechanism for removing toner cartridges. Cartridges are usually located beneath the printer's scanning assembly, so you'll need to open the lid. Generally, you just press the cartridge down until you hear a click indicating it's disengaged. Then, gently shake it until the cartridge slides out.
- Don't forget to consult the user manual if you're unsure how to remove the toner cartridge.
- Do not force the cartridge out if it doesn't come out easily, as this could damage both the cartridge and the printer.

Use a utility knife to peel off the label from each toner cartridge. If you have never refilled the toner before, the label covering the refill hole will still be intact. Carefully slide the blade under the label and peel it off. After refilling the toner, you will seal the hole with tape, so you can remove the entire label.

Use a hand drill to drill into the hole at the top of the toner cartridge. There is a small circular mark at the top of the cartridge indicating where to drill for refilling. Hold the cartridge steady with one hand and use the drill with the other. Drill into the circle until the drill bit penetrates the plastic, then rotate the drill bit to enlarge the hole.

Insert a needle into each hole to identify the color to refill. For color cartridges, you need to identify which color to fill in each compartment. Use a long needle to gently push it down to the bottom of the compartment until the needle touches the base. Then, move the needle back and forth and pull it out to determine the color of the toner in that compartment.
Refill and reassemble the toner cartridge

Fill with the correct toner color. Dip the syringe into the appropriate toner color. If the syringe has a squeeze attachment, squeeze it to fill the syringe. If it uses a plunger, pull the handle to draw the toner into the syringe.
- Black Canon toner cartridges usually hold 7 ml, while color cartridges hold 3 ml per compartment. However, the exact amount of toner needed depends on the cartridge model. Check the cartridge capacity in the manual and fill the syringe with the correct amount of toner.
- Perform this step over a cloth or in an area that is easy to clean to avoid toner spills.

Refill toner through the hole in the cartridge. Insert the syringe into the cartridge and slowly inject the toner. Avoid refilling too quickly, as the cartridge may overflow. Stop when the toner begins to leak from the hole.

Clean the toner cartridge. Use a cloth or paper towel to wipe the cartridge clean. You may also dampen the cloth with some rubbing alcohol to gently clean the sensor area of each cartridge. If toner is on the sensor, the printer will not be able to read it.
Seal the hole you drilled with tape. Cover the entire top of the cartridge to prevent toner from leaking. Smooth the tape down to reduce air bubbles that could affect the printer's function. Next, use a needle or toothpick to puncture a small hole in the tape, directly over the hole you drilled. This will serve as the air vent for the toner cartridge.
- It is recommended to use tape that can be easily removed for future refills. Masking tape or electrical tape works well. Avoid using aluminum foil tape due to its strong adhesive.

Reinstall the toner cartridges into the printer. Place each cartridge back into its designated tray. Depending on your printer model, you may need to push the cartridge down until you hear a clicking sound, which indicates it is properly seated.
- Double-check to ensure the cartridges are in the correct trays.

Perform a test print. Check the results to ensure that the printer is functioning properly after reinstalling the toner cartridges. You can print anything, but a specialized test page will check all colors on the same sheet of paper.
- For Windows computers, follow the steps to print a test page at https://www.dell.com/support/kbdoc/en-us/000123918/how-to-print-a-test-page-in-windows.
- For Mac computers, visit and print the test page at https://support.usa.canon.com/kb/index?page=content&id=ART166363&actp=RSS.
Warning
- Printer toner can stain your skin. If you get toner on yourself, wash it off immediately.
Things You Will Need
- Toner refill kit
- Manual hand drill
- Gloves
- Utility knife
- Cloth or paper towels
- Rubbing alcohol
- Tape
- Needle or toothpick
