Thanks for the rosin bag idea. I already use durazorb over grip by Prince. I am hoping to hear from people who use a glove for the purpose of staying dry. I'm willing to put up with the jokes if they work well!
I own a Prince O3 Speedport Red Tennis Racquet and the original grip on this racket has lasted longer than any after market grip I have ever tried. I sweat like a pig when I play so I am not easily impressed. I only towel off my soaking hands on change overs. The grip has stayed in my hands for about 6 months before I had to replace it with the factory grip again. I'm a big fan of Prince factory grips.
My partner uses the Tourna Grip by Unique Sports like Mark de Mayor suggests but he still changes the grip out after every 3 matches with him (about 6 hours of 4.5 NTRP playing).