I bought a used treadmill from an online yard sale and it ended up being a bust (I wish my husband wouldn’t have gone through with the sale when he went to pick it up but anyway 🙄). It is filthy and reaks of smoke. I have rubbed it down with baking soda and vinegar and I’m going to use soap tomorrow. It STILL has nicotine on the cloth!!!! I’m not going to use it until the rag is clean. But I’m still so paranoid about it being harmful. Any reassurance? Thanks ladies!