How can I manually clean the print head on my Canon Pixma printer to address the 5100 error?

Manually cleaning involves removing the print head (consult your manual for instructions), gently soaking a lint-free cloth with distilled water, and carefully wiping the bottom of the print head where the nozzles are located. Avoid touching the electrical contacts. Reinstall the print head and try printing. *Caution: This can damage the print head if not done carefully.*