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Hello yall, I have been saving all of my old dmt jars and recently did 2 pulls on each on of them all in one go. There were about 7 jars and every last one of their lid linings were deteriorating and flaking off. The deterioration is also noticeable on my very recently made jars. This is especially concerning because i read on the nexus that those lids do contain BPA and im sure other things that may or may not be soluble in naphtha but nonetheless SHOULD NOT be contaminating your extractions. I believe i have a solution to the problem where mason jars can still be used but i have not tested it out yet. basically it envolved using a layer of ptfe to seperate your wb and nap from the lid. PLEASE! DO NOT CONTINUE TO USE MASON JAR LIDS AND IF YOU DO YOU SHOULD IDEALY WASH OFF THE INSIDE OF THE LID WITH VINEGAR THEN WATER AS MUCH AS POSSIBLE ESPECIALLY BEFORE PUTTING AWAY THE JAR FOR STORAGE. hopefully you wont open a jar to see fleks of coating falling into your wb. JW