To understand the necessity of resetter software, one must understand the printing mechanism. Epson inkjet printers utilize a print head that cleans itself by spraying ink through the nozzles to prevent clogging. This waste ink is channeled into a porous pad located at the bottom of the printer, known as the Waste Ink Pad.

The (also known as a resetter) is a proprietary service utility that communicates directly with the printer’s EEPROM (memory chip) to reset these counters back to zero.