dicko wrote:
Disolved iron in water wont make red spots. It'll make the whole
garment dingy red. You need a solid rust particle to make spots. So
it could be something upstream in the water system that is shedding
rust specks, or as I said, the washing machine itself.

Not true.

For example, check out the following:

http://www.goodhousekeeping.com/name...-huddy-fabrics

Excerpt:

"Textiles Director Kathleen Huddy answered questions on our Good
Housekeeping On Your Side message board on April 24. Read a few excerpts
below.

Rust Spots on Clothing

Q: I am having trouble with rust spots on my clothes after they're
washed. I've checked the washer and dryer drums for rust, but I don't
see anything. My white clothes are affected more than the colored
clothes. I've tried bleach and other treatments, but nothing seems to
help. I do have well water. Do you think this could have anything to do
with it? I also have a water softener. I'm willing to try any suggestion
you might have.
kitchensclosed

A: Well water sometimes contains high amounts of iron, which can cause
the rust spots. Try the RIT Dye Rust Remover. That should do the job.
It's sold at grocery stores in the cleaning section."