I remember two parts of the story in question:
- the protagonist was temporarily liquefied and expanded enough to fill a swimming pool while his cells underwent some kind of cleaning or surveillance
- afterwards, when the protagonist plucked his eyelashes they would give a kind of static or electric "pop"; if I remember correctly he did this to pass the time
The likeliest place for me to have read this would be in an issue of Asimov's magazine in the early to mid-90s (and second-likeliest would have been a "best science fiction short stories" anthology from the same timeframe).
Thanks to the answers to my last question I knew to first search for [story-identification] swimming pool
and [story-identification] eyelash
but didn't find any likely results. :)