I do not know if that is widely known, but I’ve just found it out, I tested it and I thought to post about it.
Heat some water until it’s almost boiled. It has to be steamy hot.
All you have to do is paint your nails and before they dry, place them over hot water for a few seconds and the steam will make the color matte! As simple as that!
Just be extra careful when dealing with hot water.
I tested it and I find it pretty effective. The steam technique makes the nail color matte in just a few seconds. The result is probably not as matte as using a matte top coat, but it’s definitely not glossy, as you can see in the image below. And it does not cost anything!
I painted my nails with 87 Ocean Blue nail polish by Korres.