I can remember my boss buying one decades ago (worked in a nightclub at the time) "its the future" he repeatedly said. It lasted about a day in that sweatbox of a club.
(, Sat 20 Feb 2021, 22:40, Reply)
If the fog itself doesn't interfere with playback, then the residue build-up over time traps dust.
(, Sat 20 Feb 2021, 23:57, Reply)