Quote Originally Posted by jerrybyers View Post
I add 5-6 drops with my shaving cream and then create a lather. Some shaving creams don't need it, but with others and soap, it makes a difference.
In my limited experience I have found that a few drops helps to avoid the lather drying out .

However the results when using glycerin do not convince me that it is absolutely necessary. I have noticed that it is usually only required when the relative humidity is low.