PIXMA iX6820 Horizontal black lines

[blackforest]

Hello,

I am having issues randomly pop up with my PIXMA iX6820 printer. We have been using this printer at work for 4 years with no issues, and now this has started any time we print with black or darker image spots. Please see attached images. 

[blackforest]

Please can anyone help with this?

[Danny]

Thanks for joining the conversation, blackforest!

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