Happy with the actual product but not the quality

I ordered the pins during the deal; they turned out nice, nothing really to complain about. However, they've been in storage for a month or so and when I went to pull one out to attach to branding card for an order, I realized the backs (actual pin hardware) are no longer sticking to the actual pin :( I thought maybe it was a one off but ALL of them no longer adhere to the pin which makes them kind of pointless/ do not feel comfortable selling them to my customers. Love sticker Mule, but I would not recommend the pins