It depends what it is, but sometimes I just can’t remove it and it’s best to just get rid of it. The petroleum based chemicals are designed to stay. The time energy and chemicals it takes to to try to remove it with solvents is over the top in my experience. Bleach did not work. Four months hanging outside in the sun rain and snow did not not work for me. It improved somewhat but not enough. Vodka is a solvent and even that did not work. A strong acid, like a lot of vitamin C powder, worked a little bit but damaged the clothing in the process. EnvrioKlenz is a good product I think, but it did not remove the perfume chemicals. It’s just not wort it to me.