Don't leave a hot iron on your couch. It will leave a horrible burn mark.
Backstory: This summer when I was directing a summer scholastic program, I ended up doing a lot of the building maintenance myself to keep good relations with our Catholic school landlords. I found a genius way to get rid of carpet stains after one of the kids spilled their red gatorade all over the off-white carpeting. Last week I decided to "steam clean" my own couch using the same method to give it another year of life.
So this week we are couch shopping.