So I was pouring a cream ale earlier and I noticed a long deep crack on the inside of the neck of the bottle. I of course through out the bottle but was just surprised. This is only the second bottle I've had crack (although I've broken others) and I think the first one that actually leaked a bit was banged around the fridge. I don't think I've over-carbed the bottles. Could it be from the bottle capper? I had the cap flop off once and actually crushed the neck of the bottle. Is it just from being reused several times? It's really not a big deal I'm just curious. Like how often do those of you that bottle encounter cracks and how often do you replace bottles?