Did you seal the Pyex dish? ..
1: Put Naphtha in a Jam Jar
2: Jam jar in freezer
3: 12hours+
4: See Crystals on sides of Jam Jar
5: Slowly pour off liquid into a cup
6: Leave Jam Jar sideways with the lid off to evap
"See- Do- Know- Share-
"Your Beginning To Believe"