I had a car whose windshield regularly developed a film of some sort on the inside - especially in the heat. I was told this was caused by gas being emitted by the plastic in the top of the dash. I worry that something similar could happen to eyepieces.
There are so many types of plastics near eyepieces:
parts of the EP itself (I assume these are okay)
translucent EP covers (cloudy white, at the scope end, also "bolt" cases)
soft plastic EP covers (usually bright yellow)
hard plastic EP covers (black ones at the eye end)
the ziplock bags new EPs often come in
various types of foam in multi-EP cases
different wood finishes used in DIY homemade EP cases
Am I being overly cautious here? Are any types of EP covers safer than others? What are "best practices" for storage of EPs? Keep them in the original packages, put them in a carrying case for observing, and then put them back? Replace the original packaging with something else?
Or, like I said, am I being overly cautious?