It's not uncommon to never see your chameleon drink. That in itself is not a huge problem. Kind of the way to measure if your chameleon drinks enough is more by the urate's color (the white poop thing) and other symptoms like sunken eyes, etc.
If you're worried about your chameleon drinking, though, you do not want to do something like make them hiss then spray them in their mouth. That's a quick way to get water in their lungs and not advisable. A similar but safer technique is to take an eyedropper and put a drop of water on their forehead between their eyes. The drop of water will roll forward over their mouth and a lot of chameleons will lick the water off their face.
Another productive method is to give your chameleon a bath. The way I do it is by filling a tub of water deep enough that the chameleon's stomach is submerged in the water but shallow enough that there's no possible way he can drown. The water vapor will help as your chameleon breathes that in and some water will be absorbed through the chameleon's vent. There is another way you can give a chameleon a bath where you take one of their plants and set it up in a shower then take the showerhead and spray a nearby wall of the shower with water producing a lot of mist. With either of these techniques you'll want a 15-30 minute bath.
I always make sure to put my guy underneath his basking light after a bath.
As for other problems: Yes, you are over supplementing D3. Once every two weeks dusting crickets with D3 is recommended.
Your night temperature is too high if I'm understanding it correctly. It looks like you say with the night bulb it's 86 degrees in there? The other people here are likely to recommend no night bulb. I don't use a night bulb for my chameleon, I just make sure to keep the temperature above 65F. This works for veiled chameleons, not necessarily others who have more narrow requirements.
My chameleon had some problems with D3 oversupplementation (maybe) and he was in a bad state for a little bit not using his back legs. He's getting past it but it's been nearly a month since the problems began.
Anyway, people will be able to offer you better help if you read this thread and post in this format:
https://www.chameleonforums.com/how-ask-help-66/
Also, here is a resource about chameleon poop including urates. You'll be able to use this information to determine if your chameleon actually needs to drink more:
https://www.chameleonforums.com/poop-101-a-120171/