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