Yesterday I posted about hot to get OxiClean dishwasher detergent for just $1.59 at Target. The deal gets even better with an unadvertised promotion! OxiClean dishwasher detergent is buy three get one free at Target. There were no signs up at my store but if you scan the product at a price scanner you will see that it says “Special Purchase” on the screen. Stack a high-value printable manufacturer coupon with a Target Cartwheel offer to score four OxiClean dishwasher detergents for the $0.69 each!