Anti-fogging device for COVID mask

cults3d

Device to be inserted in the surgical mask in place of the metal tongue. (After several tries my device seems to be effective) 1/ Remove the metal blade from the mask. 2/ At the location of the metal blade, on the edge of the mask on the inside, make a hole with a sharp object (Knife), and insert the printed device, the latter can be heated to adapt it to the shape of your face.