The soleplate is the part of your iron that touches your clothes. Over time, mineral deposits from water can build up on the soleplate, which creates a yellowish film. If not removed, this film will leave unsightly marks on your freshly laundered clothing. Luckily, this problem can be fixed really easily, so add it to your spring cleaning checklist!
Safety note: Make sure your iron is off, unplugged and completely cool before you clean it!
Create a paste. Mix 1 tablespoon water and 2 tablespoons baking soda until they form a paste.
Coat the soleplate. Spread the paste over the plate with an old toothbrush, covering all stained areas.
Wipe it clean. Use a clean, damp cloth to remove the paste.
Clean out the reservoir and vents. Fill the reservoir with a solution of ¼ cup vinegar and ¾ cup of water. Turn your iron to the maximum steam setting, and then steam-iron a clean cloth for a few minutes. The vinegar water will clear the vents of any deposits.
Always empty your reservoir. As a general rule, be sure to dump any excess water from the reservoir after each ironing session. Storing your iron with stagnant water can clog the steam holes and create abnormal mineral buildup.