I had a really bad bird mite infection for 4 years and I researched Borax 20 Mule team which said it was an insecticide also loads of health benefits so I began having baths about a cup and then I would wash my clothes in borax (about a cup per wash). Then I would get a spray bottle and mix borax with water and spray my environment with it. I have to say it really helped alot at first but after long term exposure to borax I began to get chemically sensitive to it. My blood pressure would drop really low, my eyes were yellow and blood shot with big circles around them. Mental fogginess, dizzy spells all the time. I would get so nauseous I couldn't function with daily life. I know I've done damage to my pancreas and kidneys and my liver. It's going to take a while to recover. My advice to all reading about borax-yes it comes from the earth but I regret ever using it. ACV is a great alternate and the health benefits are amazing.