My roommate is a slob. Are these ruined?

We have a second bathroom in our house that my slob of a roommate took over.. when a pipe came loose and soaked the floor, she used a bunch of little microfiber towels we have to clean it up, but the mats (the ones that go in front of the toilet and bathtub) were soaked. Being the lazy person she is, she took the mats and all of the little towels and stuffed them into a small garbage bag and they sat in her closet for like 3 or more weeks soaked. I just found them yesterday and tried washing them twice, but I can't get the mildew smell out. Are they ruined? Should I just throw them away? Or is there something I can do? They still look in perfect condition, they just stink so bad.