First you need to let the thing get completely healed. Choose from the hints above and maybe try something like Chamois Butter or Body Glide. My favorite is Gold Bond Friction Defense which is similar to Body Glide but more readily available (Walmart, etc.) Baby wipes after the ride. If you can go commando for awhile after, even better. It's most likely a heat and sweat problem, the distance isn't enough for the saddle to be an issue.