Hi Posey,
If Iron out is working makes you wonder if a Iron dependent bacteria is involved. I have wondered about this when it comes to our water. I do not think I have high Iron but possible a high Manganese. Both can feed bacteria. I use to have the fibers fly out of my front load washer when I opened it at the end of a load. I have not seen this with my new top loader but maybe one time with clothes I believe were more contaminated more then the general ones . Has anyone else made a connection with sports clothes having more issues? I feel like I am being attacked by both mold and bacteria and insects as a result of the first two.
. Just got a high end air purifier and I ordered a new vacuum. No more bagless for me to much contamination when emptying them. Is there a fabric that anyone has found that is resistant to this? Silk? maybe.