Complex sentence: Commonly encountered pre-packaged desiccants are solids, and work through absorption or adsorption of water, or a combination of the two desiccants for specialised purposes may be in forms other than solid, and may work through other principles, such as chemical bonding of water molecules.
Split into simpler sentences: Commonly encountered pre-packaged desiccants are solids, and work through absorption or adsorption of water, or a combination of the two. Desiccants for specialised purposes may be in forms other than solid, and may work through other principles, such as chemical bonding of water molecules.