Canon printer not printing properly refers to issues users experience when their Canon printer fails to produce clear, accurate, or complete prints. This can include problems such as blurry or faded prints, missing colors, streaks, or the printer not printing at all. Common causes may include low ink levels, clogged print heads, incorrect settings, or software glitches. Troubleshooting typically involves checking ink cartridges, cleaning the print heads, updating drivers, and ensuring proper connection settings.