Don't feel badly, I've done the same thing. I was able to remove the melted plastic by turning the iron all the way up, and rubbing with an old terrycloth towel.

I heated on low and temp was enough to remove with a towel

You might try a fine grade steel wool to remove any plastic residue. It will also shine up the bottom of a stainless steel iron plate and shouldn't harm the finish if it's a teflon coating.

will do all of the above, thanks!

Were you able to clean it up, Sylvia?

Look up You Tube videos and Google this. Here is what I found. My curling iron melted a plastic IKEA tray. Have a big blob of plastic on Conair ceramic iron….

1. Freeze it or put it in a bowl of ice. Leave 3+ hours, then scrape with a wood spatula or anything that will help flake off the plastic.

OR

2. Petroleum jelly dissolves plastic. Then wipe off with old towel.

OR

3. Soak it in acetone ( finger nail polish remover).

OR

4. Make a paste of baking soda with a little water. it should dissolve plastic.

( Note - none of the recommendations other than my list were found in my search.)