Do electrostatic speakers "break down" in time?


I am new to Stats, but wonder if there is a general rule of how long a panel can last if it is not abused, kept from sunlight, smoke, and is cleaned for dust with care on a regular basis?
I know perhaps there may be no answer to this, and no answer can be definitive, but any thoughts would be nice.

for the record I own Innersound Eros MKII speakers
chadnliz
The current panels in my CLS IIZ's have been in use since 1991. Moved once, stored twice, and sound as fresh and accurate as ever.
The panels are darn near indestructable. You can poke holes through something like 1/3 of the panel before affecting the sound (according to the rep).
Kool Bignerd100, Does this mean I will get more air surrounding the instruments?