I have just plain cotton t-shirts that have splattered grease spots on them for cooking and they have been washed several times and dried. Now I have a big pile of fairly new t-shirts that all look like they have wet spots on them. Any suggestions on how to get those out?
Dawn dishwashing detergent works great on my son's shirts from McDonald's and believe me he can sure get plenty of grease on his clothes.
Pour it on full strength, scrub it in with a fingernail brush or toothbrush then wash as usual in your regular laundry detergent. I add store brand colored clothes bleach.
I work in fast food and get fryer grease on my shirts all the time. I've asked for help here before, but the hints didn't help, including Dawn. I found a degreaser called "Purple Power" that took out stains that have been washed and dried many times. You can find it in Wal-Mart in the Automotive section.
I get fryer/grill grease on my clothing constantly at work. A co-worker told me about a product called Lestoil. I believe it is produced by Clorox and can be found at any hardware store.
My husband is an Ironworker and his clothes come home pitch black with grease, and even coal dust all over. The best thing I have found is a hand cleaner called GoJo, it is actually inexpensive and does wonders. Just put it on the stain, and rub in with a nail brush let sit overnight and then wash as normal.
I have been told to put them in the washer with a can of coca cola.