Astroglide as a pre-shave.
I can only imagine the comments this post will bring, but I have started using the "personal lubricant" Astroglide as a pre-shave treatment, applied before lathering. I tried several oils, but they all seemed to mess up my soap and brush and were hard to clean up. Astroglide is very slick and, as it's water soluble, cleans up easily. In fact, I sometimes reapply it after the first pass before relathering. It can be found in the family planning section of most pharmacies and at Walmart.