now the question is, why have they put two protective plates up the front? - maybe you have a delicate element in the triplet that is either physically soft or possibly susceptible to moisture - or maybe even slightly toxic in some way (eg lanthanum glass can be slightly radioactive)? Perhaps when you disassemble, try to keep the room air as dry as possible using an aircon in cool mode and don't handle the elements without disposable gloves?
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