By Jacob Krol TheStreet aims to feature only the best products and services. If you buy something via one of our links, we may earn a commission. The winter season brings a drop in temperatures and drier air, resulting in ultra-dry skin, eyes, noses, and sore throats. It’s no fun, but like most things, there are products that can help. A humidifier can add some much-needed moisture back into the air, and we found one on Amazon that is down to just $30 after a 40% discount. It’s quite popular too, with more than 40,000 purchased in the past month. The AquaOasis Cool Mist Humidifier is a compact…