Overcoming dry throats

[ScubaDo]

I'm wanting to extend my bottom time and get into some tech diving, but I sometimes get a dry throat which makes it harder to control my breathing and wanting to get to the surface for a break.  I do drink fluids ahead of time and sometimes sip the water which helps, but saltwater or questionable lakes (Monona, lots of duck crap) is not an option.  Does anyone use or tried the inline moisture units?  If I get into deco dives, I need to get a better handle on this issue.