Raise your hands if laundry day is the most frustrating day of the week. It's always a crapshoot whether the grass stain in Timmy's soccer uniform is going to come out. And wrinkles…let's not even go there. Luckily for the laundry-challenged, manufacturers, including LG, Kenmore and Whirlpool have added a steam cycle to some of their washers and dryers. LG has also manufactured a washing machine that gets rid of allergens such as dust mites and pet dander. What's so special about steam? Steam not only gives cleaning a boost, but it sanitizes fabrics and removes dirt and grime better than conventional washing machines. Why does steam clean so effectively? Steam molecules move faster and are hotter than water molecules, so they get between fibers, ridding clothes of dirt and odors [source: LG]. For its part, steam dryers apply steam at the right time during the drying cycle to smooth out wrinkles and soften clothes. And if you husband's shirt wreaks of tobacco smoke or some other unsavory smell, a quick cycle through the steam dryer kills the stench.