This is a question with answer options. Goal: remove water rings on wood

Which of the following methods is more reasonable for accomplishing this goal?

Choose from:
+use an Xacto knife and scrape the ring away, then color in with the same color of crayon.;
+place a towel over them, and press with a warm iron for 10 seconds.;...I think the answer is
place a towel over them, and press with a warm iron for 10 seconds.