I tried using a pure silicone lubricant that I bought from a hardware earlier today on my gosen sg's. It worked in wonders! I felt more spin is generated and the feel on a synthetic gut is like you are using a poly string. I used to straighten the string bed on change overs. But now with silicone lubricant, no more straightening of the string bed. Plus it gives you more spin on the ball! Kenji Okimoto is right on concluding that lubricating the strings increases spin.