Front loader save water and energy, but I recently discovered they start smelling moldy after a while. Apparently this is a problem inherent to the design. You can buy super expensive tablets or use bleach and run them in an empty machine, but then you're wasting all the water and energy you'd saved... A much cheaper solution is to add borax to the wash with your clothes (20 Mule Team can be found next to other laundry detergents).
I also make my own cleaning products
. It's quick, easy, cheap and green!
I'll be testing my own high borax mix for h.e. washers and I'll publish that when it's ready....Update: don't try the high borax mix! In high concentration, borax will form crystals -- you don't want those clogging up your washing machine pipes.