Continuing with the previous explanation. A protective layer of grease prevents outer micro organisms from entering the skin. Unfortunately, a number of factors can cause this fat layer to get unbalanced. As a result, the skin dries out and becomes more sensitive to external influences. It is very important to always use a pH neutral washgel when washing your animal. Pay attention to the pH value in these products as some still contain soap and therefore the pH value can still be too high or too low. pH is the abbreviation of the Latin term ‘Potentia Hydrogenii’ and means ‘hydrogen-ion concentration’. This value is used to distinguish  acids and bases and to indicate the value, or strength. The pH value is a protective ‘acid layer’ for the skin because the hydro-lipid film also contains water on the skin surface. Influences that play a role here are skin’s own acidic substances such as sweat, horn cells and sebum.