No need for expensive stain removers;
Are you annoyed when wearing a t-shirt and getting grease stains on it, which are so hard to get out.
Simple dish washing detergent does the trick. Rub the grease stains and let sit for a little while before washing. Even old grease stains can be removed like this. I think it is the grease busting properties of dish washing detergent that does the trick.
enjoy a fun day.