Do you know all 8 of these essential onion tricks? Gourmandize Staff, 07/10/2017 Gourmandize shares Share on Facebook Share on Twitter Pin it Share on WhatsApp Share on Google+ 4/8 Previous Next ESSENTIAL ONION TRICKS Use an onion to remove sweat stains on clothing. Simply rub the stain with onion juice , let it act for a few minutes, and then wash the clothes as usual. You will be amazed at how immaculate it is!