I would open the whole thing and give it a good cleaning, it doesn't hurt it. Should see what I do to my CPU coolers, washing them like a carwash (hairdryer included), but they're nice and clean after. No water for the fans, only moist cloth. Next going to be this old monitor, opening it up and going at it in the garage with a compressor dusting it out like new (safe, can adjust the pressure).
<font color=red>Handsome A7V133 looking for long term relationship with a XP CPU. Prefer non smoker.</font color=red>