I have a humidifier but find when I use the heater, the air is too moist.
If by "too moist" you mean that you get water dripping on your nose, that's condensation (cpap'ers often call it "rainout") from the warm humidified air hitting the cold plastic of that six foot air hose.
Quite a few people, including me, have had wonderful success controlling rainout by using the Aussie heated hose instead of a standard air hose. No hose cover can do as good a job at keeping the hose warm. The heated hose will help the air from your heated humidifier stay warm and hold its moisture all the way through the long 6 foot trek to your nose. Lets your snout actually get the benefits of warmed humidified air instead of a spray of cold water by the time it gets there.
If you do a Google search for "heated cpap tube" (use those exact words without the quotes), you can find the Australian online store site that carries the heated hose. Very nice people to deal with. The first price you will see is in Australian dollars, but look for their price in U.S. dollars.