Be very wary of "cracks" or unofficial reset keys. These can often be associated with piracy or malicious software. For legitimate printer resets, it's best to use manufacturer-approved methods.
For some Epson models, a manual reset can be performed using a sequence of button presses on the printer. However, for the PX660, specific steps may vary, and it's essential to find instructions from a reliable source. epson px660 reset key crack