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Resetting the printer network settings and re-connecting the printer to your home WiFi should clear the printer EWS password. Let's try these steps:
1.) On the printer control panel, press and hold the Wireless button 
and the Cancel button 
at the same time for 5 seconds. (This steps will restore default wireless settings on the printer and enable Auto Wireless connect. Immediately continue to the next step to install the software. You have approximately 120 minutes to complete the software setup using the HP auto wireless connect feature.)
2.) Download and run HP Easy start from here.
3.) Follow the onscreen instructions to connect the printer to your home wireless network.
Let me know how it goes!
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