Glitter stickers- unfortunate bust

I want to preface this by saying the other die cut stickers I've had made have all been really excellent quality (exactly like the proofs), but the glitter stickers are NOT accurate to proof. I thought maybe it was the art I had submitted for my first glitter stickers that resulted in a really dark/dull sticker compared to the very pretty glittery outline, however I just ordered a glitter sticker sample of different artwork and the stickers that arrived are sadly all extremely dark/dull, especially when compared to the proof! :( Really bummed because the proof looked great, and the glitter outline really is so pretty, but I unfortunately the main sticker itself is really really hard to see. Would not recommend the glitter ones.