Hi Barbara, Thank you for the detailed reply. I am not familiar with MAI. I replaced my very old hot water heater. I don't wear a mask but wet down the soil before working in the garden. The 90/10 is I eat clean 90%. I don't eat processed foods except for very clean protein powder, protein bars. I make sourdough bread and it is white flour, I eat a slice most every day and I have a glass of wine most every night. I have a fairly new shower head but need to do better with cleaning / replacing. I have shortened my showers dramatically which pains me, my shower ritual was a great relaxer for me, an escape of sorts. Like you, I don't really have any symptoms, if I hadn't coughed up blood I would likely never been diagnosed. I really thought after a year of meds, I would have cleared. Thank you again, I pray for your continued strength.