When you use your BBQ grill most likely you are left with stuck-on grease all over the grates, right? To avoid this messy cleaning chore , warm up the grill, cut and peel an onion, stick a fork in it (cut side down), and rub all over the grates. There are oils in the onion that will provide a non-stick protection so you won’t have to scrub after you cook! An added bonus, the onion leaves behind sulfuric acid that will prevent illness-causing bacteria.