Combine the sale, coupon, and cash back offer to get Tide Washing Machine Cleaner for just $2.74 per box. That comes out to about 69¢ per use.

Tide Washing Machine Cleaner, 4 ct, $4.99 (reg $6.99)
-$0.50/1 Tide, Gain, Downy, Dreft, Era, or Bounce Product (excludes Ariel, Ace and trial/travel size) printable
–$1.75/1 Tide Washing Machine Cleaner, 4 or 6 ct (Ibotta Deposit) – Limit 2
$2.74 after coupon and cash back.

The oxygenated formula and specially designed surface-active ingredients remove soil, mineral, and detergent residue—even in places you can’t see, like the back of the tub, hoses, drain, and so on. These residues lead to odors that can transfer to your clothes. Tide Washing Machine leaves your washer clean and smelling fresh. Use once a month to keep your machine clean.