Why Pillow Beomes Brown ? Cannot Wash Too 1

[kalimantan 6]

I am sure most of our pillows over the month - become brown patchy here and there.

What was the cause of it ? Do we need to change the pillow ?

My pillow case wash once a week.

[archenemy 0]

do you sleep when your hair is wet or sweating something?

[dean 5]

use pillow protector?

[rickoveron 0]

drooling in your sleep makes brown stain.