I use spacebags all the time and have never had a problem with odors. It has to be from the things you put in there. Were they totally cleaned before pressing the air out? Did they have any type of plastic or rubber in or on them? That might be drying out and leaving chemical smells on the fabrics? I guess you'll have to take everything out and wash it to get rid of smells. If it's things that need dry cleaning, the smells might be old dry cleaning fluid. I once used a dry cleaner who didn't use fresh dry cleaning solvent so all of my clothes smelled like dirty socks until I figured it out. Good luck.
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