I do not use any type of cream or jell when working with reloading supplies or when actually doing the reloading. What I do do follows.

For most "dirty jobs" where I might experience some kind of contaminant I usually coat my hands with dish soap before I begin the job. A drop or two is all that is necessary for protection. Rub it all over like you were washing your hands until it dries. When done wash your hands in hot soapy water and everything will come off that might have transferred to your hands from the cases or bullets.