I hate Walmart.... USUALLY! Right now though Swiffer is offering up the same a Magazine Rebate offer at Walmart! You can check out all the details here.
Head to Walmart and look for rebate hang tags on select Swiffer products . Then go here and you can opt not to get a magazine subscription and get a $12 refund! You will see all the details on how to submit for your refund in the bottom part of the fine print. This offer is valid through 3/31/2011.