How to cean bottom plate with spray starch on it

Rowenta has a cleaning kit found where the irons are displayed.

Faultless Hot Iron Cleaner can be found in the laundry area.

Dritz Iron-Off is with sewing notions.

You can also use a damp cloth dipped in baking soda, but the above listed cleaners will work faster and better.

You can buy a sole plate cleaning kit for around $5, bedbathandbeyond has them for sure. Otherwise try some ammonia on a old towel, lay the towel flat and have the iron on the cotton setting and iron as you would over the towel where the ammonia is.... that may clean it for you if it is in fact starch!