Scentsy Layers Wonderfully Winter Washer Whiff Laundry Bundle Washer Whiffs are in crystal form, which can be poured from the dispenser and added directly to your laundry in the washing drum. Washer Whiffs do not clean, so use in conjunction with an effective detergent, such as Scentsys new ultra-concentrated Laundry Liquid in complementary fragrances or Fragrance Free. Layers laundry care products are safe to use in all types of washers and dryers, including high- efficiency and standard machines, as well as front- and top-loading machines.