Cleaning the towel used as surface protection

So, when I cast resin in my room (I rent a room in a shared space so I do not have anywhere else to do it), I protect the floor with an old old towel. Well over times of spilling bits of resin on it and laying tools on it after using them, it smells like resin fumes. How do I clean the towel? I assume I can’t just throw it in the washer anymore. But it’s kind of making me paranoid bc every once in awhile I’ll catch a whiff of resin and it makes me think there’s still active fumes around even though the towel is folded up in a plastic bin.