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<p>[QUOTE=&quot;Mac McDonald, post: 7801478, member: 117420&quot;]One more story/possibility on this. Years ago when hi-tech plastics were all the rage and many things were being converted from known/proven metals to plastic, so it was with water meters.&nbsp; Our city invested BIG bucks in replacing all its old brass water meters with the new, cheaper plastic water meters.&nbsp; Much sooner than later the readers couldn&#039;t read the meters because they were developing a hazy &quot;fog&quot; on the inside/underside of the glass (real glass, not plastic like the meter body and components).&nbsp; In increasing cases the meters stopped working altogether.&nbsp; Long story short, it was found to be gasses released from various and negative reactions to the different plastics/compounds in the meters.&nbsp; So much for technology.&nbsp; It WAS finally discovered and corrected but it took many years. I suspect maybe something like this <u>could</u> be happening with holders and plastics effecting coins...different changes in/with providers/suppliers to the mint and/or their manufacturing process/formula(s), etc. Far from an expert, but <u>maybe</u>. For what it&#039;s worth.[/QUOTE]</p><p><br /></p>

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