Hello,
Welcome to the community! You can delete products as needed, refer to this post for info.
The blinking green indicates that the device is losing cellular connection so I would start looking at why the device is losing connections. When the device does connect, what is the signal strength and quality of the connection? This can be seen in the specific device page and looking at the device vitals as shown below.
Also, as you continue to troubleshoot you can use the various LED modes to get an idea what is occurring with your device. For more info related to the LED modes refer to this doc (modes are the same even though the doc references the Photon).