Arm & Hammer Detergent as low as $2.79 Couponing at Tops Posted on September 26, 2016 by adminSeptember 26, 2016 So I spotted a nice sale on Arm & Hammer detergent. Only to find out we have no available coupons! Shoot! Well either way, it’s not a bad price for some detergent if you are in need of some this week. Maybe we will get lucky and get a new coupon!