We've all used electric irons before to get our clothes crisp and wrinkle-free, but what happens when you use a little too much starch? The bottom hot plate, called the soleplate, accumulates some gunky buildup. Even if you're not over-starching your dress shirts, your Rowenta iron may be getting some gunk on the soleplate, which doesn't produce a perfectly ironed shirt. That's where the Rowenta ZD100 cleaning kit comes in handy. If you get one of these, you could easily clean your iron yourself, instead of junking it and buying a new one. Follow these video instructions to learn how to use the ZD100 kit.