Here's another product: Grandma's Secret Spot Remover.
It can be found at your local retail fabric chain stores. I have had success from some unknown source of spots that went throught the wash and the dryer. After several sessions of allowing the product to sit, then rinse, then sit on stain, then rinse, etc. The spot disappeared. Don't dry in the dryer until satisfied with the results. Let air dry before a regular wash and dry cycle.
Pam M