Iced grapefruit tea

My baby has had a fever and a cold, and the doctor says it's a little allergic to the weather. Worrying, I've been trying to get her something to clean her lungs, and I've made some silver-eared soups, and I've been looking for information that the tea clears her lungs and coughs, so I'm going to try and share it with you! Next is the selection of grapefruits, five tricks, one not round at the top, two not small at the top, three not small at the top, one not yellow at the bottom, four not brighter than green, five not heavy, one at the bottom with the finger