Unfortunately there is no way to completely remove fiberglass from clothing. If you try washing, make sure not to wash them with anything NOT already contaminated. Wipe the washer and dryer afterwards, and then wash them at least once again.
Remember, these are hairs of GLASS embedded in clothes and toys.
Good wishes with this.
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Your conscious mind may not be able to understand what I'm telling you, but I trust your unconscious mind to use that part that is most relevant.