Just make sure to clip the extra 15% off coupon at checkout! And btw, it works in both top-loading and front-loading machines.

Home Is Where Where The Deals Are On Prime Day — Shop ‘Em Before It’s Too Late

Promising review:"Washer started smelling a bit funky several months after we got it. I didn't understand why I couldn't just run bleach in my machine to clean it out occasionally, until I actually ran one of these tablets (free sample with my washer).The key is that the tablet goes in the washer drum, and doesn't dissolve right away. So as the washer runs through several repeated cycles of fill, agitate, and drain - the tablet is still there, sudsing up the water on cycle #2 and #3. If you just put bleach in the soap dispenser, it would all be gone after cycle #1.Also, this gets very sudsy and that probably helps it reach some areas of the machine that wouldn't otherwise get touched." —aberson

Price:$10.19 for six tablets (originally $13.98; also available in a pack of five tablets)