The most aggressive and efficient way to remove humidity is to purchase an electric air dehumidifier. These appliances are designed to dry and pump moisture out of the air. The technology is very similar to that of air conditioners or refrigerators, but with greater air-drying ability. Most pump systems are designed with a fan, a hot coil and a cold coil to take in moist air and release dry air.
Silica gel dehumidifiers are designed to chemically absorb the moisture in the air and collect the water at the same time. Place these gel containers throughout the room or house, and the silica granule desiccants will pull water molecules out of the air. Keep silica desiccants out of reach of children or pets, as they are poisonous. Good ventilation contributes to the success of this method.
Rock salt is an affordable and reusable option that works steadily to dry air over a long period. Much like the silica gel, rock salt is a desiccant and can reduce air moisture without electricity or much preparation. The common approach is to fill a clean 5-gallon bucket with rock salt, let sit until the crystals are wet to the touch, pour the rock salt onto a tarp or plastic sheet and let dry before collecting in the bucket for reuse. Good air ventilation is key to the success of this method.