A couple of years ago I needed to burn some brush that I'd cleared on a property. I had some PJ and CB firestarters in my trucks bug out bag. It was towards the end of summer (around here, 100+ is common) and when I pulled them out the high heat had basically turned the PJ into WD-40 which had leaked out of zip lock bag and gotten all over everything. The petroleum had also reacted with some plastic stuff that got goey and ruined more stuff, including most of the first aid kit and waterproof matches. In all, had to throw out probably half the stuff and couldn't start the fire the easy way. It was a real eye opener. Would have been completely SOL if I didn't have a sparking mag bar. Was also difficult to get a good spark, had to scrape some gunk off first. Might have been on the way to ruining the flint too.

Just read about using chapstick as an expedient coating for cotton balls. I would rather not have to use the chapstick for that. Spent a recent weekend doing roof repair to rental in a hard, all-day wind. Didn't have any chapstick and was just miserable. Got very windburned. Got to thinking about how that would have added another bad layer to an already bad survival situation. Just like being cold and wet, that kind of stuff can really add up and sap your will to survive.

Moral here is to try the recipes\ideas on this thread. They won't leak and ruin stuff, and you won't be using up a resource that can be used on lips, face, and hands in a survival situation.