Review on EnvioHome Kids Bedding 100% Cotton Sheet Set - Breathable, All-Around Elastic Fitted Sheet Set, Extra Soft - 3 Piece, Twin XL, Aqua Leopard by Jessica Brown

Got a set of pink leopard print king sheets to cover hotel beds for my dog to sleep on the bed. Washed twice, never used. The color stays in place. However, even after 2 washes, the sheets still have a weird "oily" smell, just like when you first unpacked them. I do not know what it is. Ink? Otherwise it seems like a decent product for the money. They're thin, probably to be expected for the price, but I'll use them again as a cover. I hope the smell of oil goes away. You may need to hang them outside on a string for a day or so. All suggestions are welcome here