[with brows furrowed]

I hung my brown towel after using it today and noticed a bleach spot. This confuses me. When I wash towels, I wash them all together, without bleach.

I just switched a load of blue towels from the washer to the dryer and noticed another bleach spot on a blue towel. I have no idea how it got there.

The facts:

The brown towels were washed several loads before the blue towels.

I rarely use bleach.

I haven’t used bleach in quite some time.

No other items had bleach spots on them, only one brown towel and one blue towel in their separate loads.

I’m managing to ruin our towels one at a time.

I’m confused.