So there's been a theory going around for a few years that scrubbing your grill with an onion is the best way to clean it.
Stating that the onion actually has antibacterial properties, the trending hack has barbequers slicing onions in half to use as a scrubbing tool.
Supposedly meant to decontaminate the grill (along with removing burnt-on food), onions have been deemed the super-food of barbeques.