IMO, I am convinced this will work even better than the above. Get Lugols 5% Iodine from Amazon.Com. Mix into 20% Iodine & 80% Grapeseed Oil, and add a few drops of Now Foods soy based Liquid Lecithin so the oil mixes with the Lugols & apply daily. Alternative: mix in a few drops of lemon juice as an emulsifier. Iodine also kills chiggers on contact, so the same mix will kill chiggers.