I always hand wash old pyrex. They were designed before dishwashers were a ubiquitous household appliance, and so the finish can’t take the stress. Same with vintage pyrex mixing bowls - if you wash them in a dishwasher, eventually they’ll lose their finish and strip down to the paint, making them feel like a chalkboard.
I always hand wash old pyrex. They were designed before dishwashers were a ubiquitous household appliance, and so the finish can’t take the stress. Same with vintage pyrex mixing bowls - if you wash them in a dishwasher, eventually they’ll lose their finish and strip down to the paint, making them feel like a chalkboard.