Has anyone tried ironing the eras tour merch before washing?

My mom and sister got some merch in Arlington, they are worried about fading. Has anyone tried any tricks to keep the designs from fading, mainly wondering about ironing the designs before washing because it was mentioned somewhere on tiktok. For reference they got the beige shirt w/ black design, black on black hoodie, and the black shirt with the color design. Any advice is greatly appreciated.