Yellow pillows are gross, and no one wants to sleep on them. But, there is a way to save them. Use powdered laundry detergent, powdered dishwasher detergent, and borax.
All you need to do is to bring a large pot of water to boil, stir in 1 cup of powdered laundry detergent, 1 cup of powdered dishwasher detergent, and 1/2 cup of borax. Stir until everything dissolves. Then, pour this mixture into a container large enough for you to soak your pillows in and 1 cup of bleach.
Finally, let your pillows soak in this mixture for 30 minutes. Don’t forget to flip them half-way through and you must run the pillows through a full wash cycle in a washing machine