What does it mean when they write this on a medicine cream?

''washing with soap and water prior to application enhances the efficiency of the preparation''. WHAT DOES IT MEAN?What does it mean when they write this on a medicine cream?
Its better to wash your face befor applying the cream.What does it mean when they write this on a medicine cream?
Totally clean skin makes the product work better.
It means you need to wash the area of skin before applying the cream as it helps the skin to absorb the cream better
it means that U must wash the skin 4 better results


jane
It means if the cream does not yeild the desired results its your fault not the manufacturers! (Pun Intended)
It means there's less gunk on your skin for the medication to penetrate and get absorbed.
Skin absorbs much more of the product after it has been wet. Anytime you want a medication to be absorbed better and therefore work better, apply it to just washed skin that has been patted dry. Simple as that.
it works better if you wash before using it
it means whatever area you are putting the cream on....should be cleaned first and dry