I just got my first packer (mr. limpy, how do you do) a while back, and I've heard you have to dust it with cornstarch. There's none around the house, and I can't ask my mom to get some for me (even if *I* pay for it) because she will endlessly bug me on what it's for; I'm not very good with lying. "I'm using it to prolong the lifespan of my rubber penis that you're not supposed to know about," is just. no. XD
I've been using baby powder, but I've heard you're not supposed to? I've also heard baking powder works. (Or maybe it's baking soda. I always mix those up.)
On a side note: I wear my packer in the shower, is there any problem with shampoo/body wash/etc getting on it?