Summer is synonymous with backyard barbecues, and nothing signifies a successful grilling season quite like that perfect sear on a juicy steak or the smoky aroma of grilled vegetables. However, with these summer delights comes the inevitable challenge: cleaning those greasy, charred grill grates. After a few months of heavy use, my grill grates were coated in a stubborn layer of grease and carbonized food bits that seemed impervious to traditional cleaning methods. Desperate for a solution that didn’t involve hours of scrubbing, I turned to a hack I had read about online—using household ammonia to effortlessly dissolve grill grime.
Intrigued by the promise of minimal effort and maximum results, I decided to put this method to the test. Armed with a black trash bag, a bottle of ammonia, and a bit of skepticism, I embarked on a three-day cleaning experiment. Here’s what happened when I left my grill grates soaking in ammonia inside a sealed black trash bag for 72 hours.
1. Why I Turned To The Black-Trash-Bag-Ammonia Hack
The idea of using ammonia to clean grill grates is rooted in its reputation as a powerful degreaser capable of cutting through the toughest grime. After numerous failed attempts to clean my grill grates with conventional methods like wire brushes and soapy water, I was ready to try something new. The ammonia hack promised to dissolve grease without the need for scrubbing, and given my grates were approximately 18 inches by 12 inches each, it seemed like an efficient solution for such a large surface area.
My initial hesitation stemmed from concerns about safety and the potential for damage to the grates’ coating. However, the numerous online testimonials and step-by-step guides convinced me that this method was worth trying. Plus, with a cost of under $5 for a bottle of ammonia and a trash bag, it seemed like an affordable experiment.
2. Setting Up The Soak: Exactly How I Prepped The Grates
To begin, I first removed the grates from the grill and gave them a quick rinse with water to remove any loose debris. Then, I placed the grates inside a sturdy black trash bag, ensuring they were laid flat to maximize exposure to the ammonia fumes. Next, I carefully poured about 2 cups of household ammonia into the bag, avoiding direct contact with the grates. The key here is not to submerge the grates in the liquid, but rather to let the fumes do the work.
Once the ammonia was in, I sealed the bag tightly using a twist tie and placed it in a sunny spot in the backyard, as the heat would help to activate the ammonia fumes. With everything set up, all that was left to do was wait for three days.
3. The Science: How Ammonia Is Supposed To Melt Grill Grease
Ammonia is a common household cleaner known for its ability to break down grease due to its alkaline nature. When exposed to air, ammonia releases fumes that can soften and dissolve grease and grime. This makes it particularly effective on surfaces like grill grates, which are often coated in baked-on residue.
The idea behind the trash-bag-ammonia hack is that the sealed environment traps the ammonia fumes, allowing them to penetrate and loosen the stubborn grease without direct scrubbing. This chemical reaction between ammonia and the greasy residue facilitates the removal of the grime, theoretically making the cleaning process much easier.



