There are a few ways to reset a Mikrotik router:

1. Via the RouterOS web interface:

- Log into your Mikrotik router's web interface (default IP address is 192.168.88.1)

- Go to System -> Reboot -> Router

- Click the "Reset configuration" checkbox

- Click Reboot

- The router will reboot and reset to factory default settings

2. Via the RouterOS terminal:

- Connect to your Mikrotik router via the serial console port or SSH

- Enter the command: /system reset-configuration

- When prompted, enter "y" to confirm 

- The router will reboot and reset to factory default settings

3. Using the reset button:

- Locate the reset button on your Mikrotik router. It will typically be a small pinhole button.

- With the router powered on, press and hold the reset button for at least 5 seconds. 

- Release the button, and the router will reboot and reset to factory default settings.

4. Remotely over SSH:

- Connect to your Mikrotik router via SSH using a terminal program like PuTTY

- Enter the command: /system reboot profile=default 

- The router will reboot and reset to factory default settings

Note that resetting the router will wipe out any configuration changes you have made and return all settings back to the default values. The router's IP address will return to the default 192.168.88.1. 

Let me know if you have any other questions!