“Use keyhole and outlet covers or insulators, and make sure any other openings are well-sealed with caulking.”
Winter air is often very dry, especially indoors and the seasonal change can cause chapped lips and dry skin due to the moisture from your skin being sucked out.
David said: “Not only do we feel colder in dry air, but adding some moisture will actually allow your indoor air to retain the heat longer. Some easy ways to increase the humidity include having well-watered houseplants, bringing your laundry to dry indoors (bonus savings for not using the dryer!), and placing shallow water containers on heating elements such as radiators.
“It also helps to open the door after showering and letting that warm, humid air flow around your home.”