Yeah, for me its old candles (LOVE the garage sale idea) from around the house, relatives, friends and church. There's always old candles at churches.
What's the longest anyone's had an egg-carton fire starter burn? I'm at 45 min right now, but want to get to 60 this spring / summer.
Im at 20 min but that was good enough for me good on you though for pushing for longer. It sounds like you are approaching sterno can time.