Best way to sterilise food

Hi

I'm wondering what might be the best way to sterilize food in general. I have tried vineager in water and ozonated water,(boiling certain food), but am thinking the food zapper or Iodine might be also a good choice. Does anyone have an opinion on the best way to sterilise food such as common vegetables and fruit especially. I have seen different advice on different sites, so that's why I'm wondering. I would like to try HCL also, but can't find any HCL in drops where I live, only HCL pills to eat. Thanks in advance for any response