It seems to me Debbie that you're paying FAR TOO MUCH for your jel. We pay $45.00 plus shipping for 24 cans, call 18006541704.
I use both of my fireplaces in winter time (for 5 years now) without any ill effects.
I keep the heat off while I work in the daylight hours and light up my fireplaces when I get home, they heat the whole place to a comfortable degree. They last 3-4 hours so it takes me close to bed time and keeps my heating bills down.