Unplug the power cord and wear gloves.
Remove the two vent cover screws. Hold both sides of the vent cover and remove it.

Open the oven door and remove the old charcoal filter.

Slide a new charcoal filter into place and close the oven door.
Install the filter at the same angle as the filter slot.

Slide the bottom of the vent cover into place. Push the top until it snaps into place. Tighten the vent cover screws in place.
Plug the power cord and set the clock.