Yup. Crank the heat up to 4 or highest setting and slow the feed down some.
Don't get in a HURRY to weld THICK metal. Have it fast enough so's it's not welding the tip to the piece but not laying lumps. Start on the thick piece and weld over to the thin back and forth like sewing up a seam.
Also, Be sure it's CLEAN wherever you welding to/from.