If you want to change your wireless internet password, then you have to follow some very simple steps.
Step 1: Connect to your router
Step 2: Access the router's login page(Use 192.168.1.1, 192.168.0.1, 192.168.100.1 IP address)
Step 3: Log in to the router
Step 4: Find the wireless settings
Step 5: Change the password
Step 6: Save the changes
That's it.