Is there any problem with thread? Is it stored and shipped under similar conditions? How would we ever wash it? What about yarn? Notions, patches, buttons, etc. It's so much to worry about.
I pre-wash and wash after my projects are completed, so at least my cloth is clean. I also spritz my ironing board with vinegar and go over it with a hot iron, then let the fan blow on it each evening to try and keep it fresher between washings.