Rain-X Windshield Washer Additive—$2.39 + Free Pickup

Kmart has a 10 oz bottle of Rain-X windshield washer fluid additive for only $2.39 right now, down from $4.89. This formula deposits the Rain-X treatment every time you use your windshield washer fluid, and water beads up and blows away.

This isn’t available for shipping, but you may be able to pick it up at your local store for free, depending on your location.