First - yes, Joanns will take it back if you have the receipt. Ask for a manager and explain that it just doesn't work. I have found over the years that these 'specialty' blades work best on scrapbooking projects even though they have been marketed to also be usable with fabric. A lot less hassle to just have a good pair of pinking shears. I keep mine in a fabric case, not the plastic sleeve, so there is no chance of moisture and haven't had to sharpen them in years.