Summarize:

Avoid melting or damaging your work surface with the heat from the iron by placing the sandwich onto a baking sheet. Put 1-2 pot holders underneath the baking sheet to keep it from slipping if needed. Instead of a baking sheet, use a heat-resistant cutting board. These are typically made out of stone or wood and can be purchased in the kitchen section of your local department store or online with major retailers. Make sure to place the hot iron back onto a heat-resistant surface to avoid damaging your work surface. Allow the iron to cool off completely before storing it. Be careful as you unwrap the sandwich, as the steam trapped within the foil will be hot. Place your grilled cheese sandwich onto a serving plate, and enjoy!  Use your butter knife to cut the sandwich in half to make it easier to eat. Repeat the cooking process as needed for any additional sandwiches. As long as the foil does not have any holes in it, reuse the same piece of foil to make multiple sandwiches.
Set the wrapped sandwich onto a baking sheet to protect your work surface. Remove the iron and turn it off when your sandwich is finished cooking. Let the sandwich rest for 1-2 minutes before unwrapping and serving it.