To prevent the mask from cracking, avoid opening and closing it suddenly. You have to put it on the face and let it take its shape with the warmth of your skin.
Fatty substances like petroleum jelly or oil-based makeup shorten the life of the mask. Always clean the inside of your mask thoroughly after using it in contact with these products.
Foam pads are included with each mask. You can stick them inside it at the support points for more comfort.