Plug in a household iron as close to the countertop as possible, or use a heavy-duty extension cord that is long enough for you to maneuver the iron around the damaged area.
Set the iron to a medium-high temperature.
Fold a bath towel in half and place it over the raised or bubbled area.
Place the iron on the towel, and move it back and forth with firm pressure to heat the glue under the laminate. Don’t hold the iron in one place, which can melt the laminate or cause widespread bubbling or lifting.
Lift the towel periodically to determine whether the glue has reactivated and the laminate is sticking.
Remove the iron and the towel once the laminate has adhered back to the countertop.
Set several large, flat, heavy objects, such as books, on the heated area to hold the laminate down until the glue has cooled.