Read the label - it spells it out very clearly.
Printed on the shampoo label is the statement: "FOR EXTRA VOLUME AND BODY."
If the shampoo drips down your bod - and of course it does if you are using it in the shower, well, at least now you know its dastardly secret.
Switch to Palmolive dish detergent for washing your hair.
The label clearly states: "DISSOLVES FAT THAT IS OTHERWISE DIFFICULT TO REMOVE."
Problem solved! So easy when you know how!
(Don't you wish? )