I have always just put sticks that I found in my yard in my RETF's tank without really doing anything to sterilize them (I only used Wipe Out). I knew that you were supposed to bake them but was afraid do it because of the fire risk. So it's time for new sticks again (the ones in there now are starting to grow this white mold-looking stuff) and I really want to bake them this time but how can I ensure that there won't be a fire?