To use, carefully open the plastic bag so that the refill bag is not damaged on the inside. You then tie a strap around the top of the bag and attach it to the ceiling or around something sturdy. It is important that the bag hangs without contact with anything for best results. Place at least a 10 litre bucket underneath and then the bag can absorb moisture and drop it into the bucket without the risk of leakage. When the bag is finished you simply replace it with a new ABSODRY PRO and the process continues.