It is pricier up front but worth it, considering that it allows consumers to save on ink cost.
Refillable Ink Tanks
Ink is the most costly consumable to keep a printer running.
But, this ink system is not without its shortcoming.

Each sheet will be pulled into the printers engine one by one until the print job is completed.
The lack of a secondary tray for input paper has one disadvantage.
This component needs to be cleaned sometimes to ensure that it always works perfectly.

To clean it, the printer uses ink.
Every cycle of cleaning, therefore, generates ink waste.
The waste is collected by another component called ink pad.

Epson L300 Resetter Free Download
The easiest way is obviously to use the software.
The said function is named Waste Ink Pad Counter.