How to Clean Starch Residue from the Bottom of an Iron. Your shirts may be perfectly starched, but your iron is worse for the wear, as you can see by the caked-on spray starch all over the sole plate. Here's a gentle way to clean that iron!
Things You'll Need
Unplug the iron and make sure it is cool to the touch.
Mix a thick paste out of 2 tbsp. baking soda and a bit of water.
Dip a clean rag into the mixture and scrub the iron's sole plate until the caked-on spray starch loosens and wipes away. You may need to use some elbow grease.
Wipe the sole plate clean with a second clean, wet rag.