Canon printer printing blurry can occur due to various reasons. The most common cause is the use of an incorrect paper type. Ensure you are using the right paper for your printer. Also, check that the print head is aligned correctly. You can do this by accessing the printer settings on your computer or on the printer's display screen. Other reasons for blurry prints could be low ink levels or using non-genuine ink cartridges. Make sure to replace the cartridges if necessary and use only genuine Canon ink cartridges.