12Pcs Washing Machine Tank Cleaner Tablets. Are you tired of your washing machine not giving you the cleanliness and freshness you desire? Do you find that no matter what you do, there’s always a lingering odor or residue that taints your laundry experience? Our 12-piece Washing Machine Tank Cleaner Dirt Detergent Effervescent Tablet is here to revolutionize how you care for your washing machine and your clothes.