Medieval Unicorn Midnight Floral Garden Yoga Mat

I was nervous to order this because I thought the image might be poorly rendered to the yoga mat. I am happy with how the image looks, HOWEVER. This yoga mat is off gassing a terrible smell. I tried hanging it outside for three days, and I washed it with several different solutions. Nothing has improved the situation. Is it safe to do yoga on this, or is it off gassing something toxic? It has been in my possession ~two weeks so far, and the smell is as strong as ever. I've never had this problem with a yoga mat before. :( Aside from that it's beautiful, and I appreciate doing yoga with my unicorn and stag buddies.