My printer had an issue where the black and color ink were printing weakly, so after using the suggestions provided online by canon, such as deep cleaning, refreshing print heads, etc. nothing worked. I continued my search online for a solution (because its not like Canon is going to pay my phone bill while I waste MY minutes on hold for their customer service). In an online forum another person had said they had received information from Canon's customer service that if you take out the print head and clean it with hot water and soak it... read full review »