Air conditioning dehydrates and dries your skin, without your realising it. Always keep a moisturiser handy if you spend the better part of your day in air-conditioned surroundings. Air conditioning dehydrates and dries your skin, without your realising it. Always keep a moisturiser handy if you spend the better part of your day in air-conditioned surroundings. Air conditioning dehydrates and dries your skin, without your realising it. Always keep a moisturiser handy if you spend the better part of your day in air-conditioned surroundings.