Hi,
The gird is printed using the same ink that is used for printing text. If you have already done 2 cleanings and 1 deep cleaning, there may be a issue with the printer and it would require service.
If your printer is still in warranty and you have a copy of the printer's proof of purchase, Canon can perform a warranty exchange. Canon does have a chat team that would be happy to assist you with this issue. Please click HERE and in the chat/ask a question box that appears, ask the chat bot to speak to a live person. Our chat agents are available Monday-Friday 8:00 am to 8:00 pm ET, excluding holidays.
If you printer is outside of it's 1 year warranty, you would qualify for the Canon Upgrade program. This is for out of warranty units which have been diagnosed to require service or are incompatible with a new or upgraded system. This program allows you the opportunity to purchase a replacement product discounted from the list price. Free ground shipping is included with your purchase.
If you would like to take advantage of this offer, please the Canon Sales Department at (866) 443-8002 Mon-Sat, 9 AM to 9pm EST excluding holidays.
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