Sorry for the late reply on this.
Here's the instructions.
Download the Epson R3880 adjustment program. We recommend 2manuals.com for this.
Unzip the file.
Install your driver and printer (if you haven't already). And connect the printer by USB.
Run the Adjustment Program for Epson R3880 printer.
Click Particular adjustment mode.
Point on Waste Ink Pad Counter and press Ok.
Press Check Button to check the Waste Ink Pad Counter.
Click Initialization to reset.
If you need to reset more counters, you can also do that with this program. it also allows for more fine-tuned head alignments, etc.