Biotherm To use Biotherm Aquasource Cream , start by making sure that the area where you want to apply the cream is clean and dry. Take a small amount of the cream and gently massage it into the skin, making sure to cover the entire area. Allow the cream to absorb fully into the skin/hair before applying any other products. It`s important to use Biotherm Aquasource Cream consistently and as directed to achieve the best results. Face Creams