Bests & Worsts Reviews from Amazon

I purchased this product 4 days ago, and as soon as I opened the package an awful mildew-like smell filled my upstairs area. The scent was so strong I could taste it almost. I know that memory foam toppers and mattresses some times give off a gas, but I didn’t expect it to be this strong. I have let it air out in the room uncovered with the windows open and fan on, and the smell is still just as strong as day one. This is the only purchase I’ve ever really debated on returning but I need this mattress for a guest this weekend so I have to keep it. I searched through the reviews before buying and only 2-3 said it gave off a smell and the other reviews were raving about the product with no complaint of a smell which makes me wonder if I got a bad one or something. I’m going to let it air out more and use baking soda on it to see if that cuts down on the odor.