What do you use to get that rancid oil smell out of pillowcases?

Okay, try baking soda & vinegar soak for 24 hours... in wash with laundry detergent. Good luck.

Hello, try soaking them in really hot water with ultra dawn dish detergent and baking soda and wring them out before the water gets too cool. Then wash them in the washer on the hot setting.

Sure it isn't the pillows??? When was the last time you washed those?

I have had good luck with Tide Sport. It has worked well for lots of really smelly clothes and towels. Hubby and one son have salt water tanks in the basement and a R/O water system to make purified water for the tanks. They use a garbage can to store the water and sometimes they don't catch it until it overflows. The old towels get stinky pretty fast if they don't put them up to dry. Only occasionally does it take two washes to get the smell out of the towels. I also put vinegar in the softener cup to help cut soap residual in the rinse cycle and help with odors if they are really stinky. I hope this will help you get the musty smell out of your pillow cases. Make sure your pillows smell ok, too. Good luck Ann!

Soak overnight in a strong Bio Washing powder . Wash again in machine. Repeat as necessary or Bin and buy new wipeable pillow cases

Not sure if this could help? https://www.hometalk.com/diy/clean/fabric/how-to-wash-throw-pillows-without-removable-covers-44461189

Hi Ann: One thing you can try is soaking them in a product called Odormute. You can get it online or at some pet stores or I think Walmart carries it. Spray the area and let it sit for about 20 minutes then wash. I know it's for pet smells, but it works on a lot of odors and should work for you, too.

Thank you Betsy, I will try it.

Wash in the hottest water as possible. I have had good luck with Tide and add a cup of vinegar to the rinse cycle.