today, I bought 1 kg salt (fine-grained washed sea salt) put it into a bowl and will let it be in the sun for about 5-7 days - the sun will put its energy into it. then pouring a bottle of (Bach) rescue drops into it and then: with this you are prepared against any type of infections or allergic stuff. you can use it to gargle your throat, against skin allergies, make a pack (like onion packs) etc.... super simple and very effective....