I've done stupid things too. Maybe there was fabric softener in it the last time it was laundered? Or not totally clean? I'd suggest giving it a good laundering - you don't have anything to loose. I had some stupid old fabric from the 70's. It was ugly and I didn't dare use it for a pieces in a quilt because it may have worn out differently. So I used it for the foundation in a strip quilt and it was a great utilization!