For this step, it is recommended to use a heat gun or hair dryer to soften the adhesive securing the microphone assembly to the upper case. You may be able to remove it without doing so, but will risk damaging the microphone cable.

With the heat gun set to low, heat the microphone assembly to loosen the adhesive attaching it to the upper case.

Be very careful not to overheat the microphones or upper case. Keep in mind that the plastic keyboard is on the other side—too much heat in a single place can melt keys.