Hope it works. I'll be interested. I did the raw onions on the bottom of the feet too. I think the first time I did that we had covid or something (couldn't taste or smell ANYTHING for about week). The 2nd time last week for my son's bad cough and it stunk the whole place out 🤣🤣 But hey I'm not bothered. Our eldest son had soooo many ear infections. The Dr put him on loads of different antibiotics and they never worked. The youngest has never had any antibiotics, so he's keen to keep that streak going as long as poss! We seem to be having a bad run of illness this winter after hardly being sick at all in many years. 
If you can get your hands on some organic lemons, chop half a lemon and blend it up whole (skin, pips and all) with water a bit of fresh ginger (if you have it) and a teaspoon of honey and just drink that up. Plus good old fashioned hot honey and lemon slices to sip. All the best.