If you forget about any therapy putty and it is not in it's case it will damage fabrics. I have ruined a few sheets, bedspread and a pillow case by forgetting about it. Simply take care, but be warned. But I have given it up as it is not worth the risk. I cannot recall the brand, but we aware that this could happen undoubtedly with most of the myriad of putties for hand therapy that you find on line. There are remedies, so I have been told, but they are at best not sure fire and you run the rsk of annoyance and no result.
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