I am new to the homebrewing of rootbeer. I was given some left over supplies by my aunt who had done one batch and decided it had been to much work. I'm reading people saying that you need to refrigerate the soda after a few days to slow down the carbonation. When I got the stuff from my aunt, we ended up leaving several bottles in the basement for about 2 years before finishing them, one had gone bad, but the last couple in the box were fine. We never had any explode. Was this a fluke? I've made a couple batches in plastic bottles that turned out good, but I'm about to make a 4 gallon run in glass bottles, and I'd like to avoid grenades if possible.