Laundry Hacks — Tested! We’ve tested the popular laundry hack of using cola to get rid of grease stains. Pour some cola on a grease stain and let it sit, then throw it in the washer and run a normal cycle. Apparently, cola cleans those tough-to-get-out grease stains and also helps deodorize smelly clothes. Have you tried this laundry hack? Visit the Sears Home Services Knowledge Center to find out if this hack, and more laundry hacks, actually work!