A buddy uses mineral oil and says it does great, but I'm leary of what it does to them (like weakening the rubber or plastic). He said it doesn't dry out like the baby oil. I just try to use mine up and get new ones before they get sticky! :D Not much help, but if nothing else, maybe it'll give you an idea. I just wouldn't douse(is this the right spelling? ) everyone of them without trying them seperately to see what happens.