Yesterday we wrote about Pledge Multi-Surface cleaner for $1.75 at Walgreens! The deal is even better than we thought because of a Checkout 51 offer! Checkout 51 is a new way to earn cash back on groceries. A smartphone isn’t even necessary. Use the buy one get one free coupon found in yesterday’s newspaper and earn a total of 2,000 Balance Rewards Points. Note that the coupon’s maximum value for the free Pledge is $4.99.