Don't throw away that clogged steam iron that you like so much. Make a mixture of equal parts of vinegar and water. Pour the solution into the water chamber of the iron and turn the iron on. Let the iron stand in the upright position for 5-10 minutes. Turn the iron off and let it stand until it's cool. Pour the water and any loose particles out afterwards. Repeat the process again if necessary. For best results do this on a regular basis.