Many areas received a $3/1 Wisk coupon in the 08/29/10 Redplum (in our area Louisville paper had it but Lexington didn't). Since Family Dollar has Wisk on sale for $4 this week, you'll pay only $1 after coupon.
Don't forget you can also price match that at Walmart. If you didn't get the coupon, make sure to check at your Walmart for one. About a week ago, my Walmart had $3/1 coupons taped to the Wisk detergents.