remove wax by hardening it with ice and peeling it off or scraping it off with a dull knife or something similar. ironing wax just drives it deeper into the fabric, making it harder to remove. furthermore, the heat of the iron will set the green color, making it more permanent.
what is your couch made of? is it a washable fabric? you could use a clothing pretreatment gel and sponge it clean after the product has had a chance to work. another thought is that peroxide removes blue pigments (including the blue portion of green), which could reduce the stain; a pale yellow could be left behind if the stain isn't completely removed. is your couch not a washable fabric? you might have to look into using a dry cleaning fluid.
whatever you do, be sure to test in an inconspicuous spot.
Source(s):
Home Comforts