Here the tutorial to reset Canon Pixma iP1880 series by manual. The following reset method has tested and work perfectly to reset waste ink counter.
Step 1: Reset hardware
Press Resume button hold for 1 – 2 minutes
Open the cover
Release the catridge and then put catridge again
Close The Cover
Turn Off
then Turn On again
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How to Reset Canon Printers to Clear the Ink Waste Tank Error Message