What is the best way to clean a steam iron bottom?

Barking Soda. Make a paste apply let dry and approx 5 minutes later wipe of with damp paper towels. Clean again with cloth and warm water dry

Put salt on a paper bag and move the iron back and forth until it cleans it off.

https://www.hometalk.com/diy/clean/appliances/diy-iron-cleaner-clean-your-burnt-iron-1217260?r=1

Follow These Steps

1. Mix water and baking soda. Make a paste of 1 tablespoon water and 2 tablespoons baking soda.
2. Apply the paste to the iron. ...
3. Wipe iron clean. ...
4. Clean steam holes. ...
5. Re-fill the reservoir. ...
6. Turn on the steam. ...

Pour out the liquid.

I used the instructions in the link, the baking soda /water paste worked great! https://www.realsimple.com/home-organizing/cleaning/laundry/clean-iron

I used the instructions in the link, the baking soda /water paste worked great! https://www.realsimple.com/home-organizing/cleaning/laundry/clean-iron