Abstract: A device to prevent the exsiccation of fluid products in a delivery head of a dispensing machine for said fluid products. The device comprises a first element able to generate a flow of air mixed with steam or with at least a solvent, and a second element able to convey the flow towards a zone underneath the delivery nozzles of the delivery head and to create in said zone a determinate atmosphere, different from the atmosphere in the environment where the dispensing machine is to be found during use. The device also comprises detection elements arranged in proximity with the delivery head and able to detect one or more significant parameters of said determinate atmosphere, and a regulation circuit able to regulate one or more characteristics of said flow according to the values detected by the detection elements in order to maintain the significant parameters of the determinate atmosphere within a set of pre-determined values.