About 4 months ago I bought a glass 6.5 gallon carboy. I did not notice any cracks in the glass. I fermented 4 gallons hard cider, cleaned and stored. I just fermented and moved to another carboy for secondary fermentation. While cleaning it I noticed about a 6 inch scratch/ crack on the taper of the neck area and found a 3" crack on the bottom. The wort was chilled before going in (76 degrees). I do lift it from the neck and bottom when moving it into keezer. Would that break it or is it defective? Do I need one of those lifting straps?