Yea they all turn yellow, I take bleach and water mix it half and half, put in a spray bottle and just spray the coller, I had to do it today on a sta...

Yea they all turn yellow, I take bleach and water mix it half and half, put in a spray bottle and just spray the coller, I had to do it today on a stain on my pants, and I have done my coller to, works well, it might take a couple of washes it is a deep stain to get out, keep it away from any colored crests, :)

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