I found out that i can see the glow through the small air intake holes near the screw. I wait until it reaches its full glow which is about 6-8 seconds.
I believe that to work as designed you now need to
go ten or more seconds longer. The core itself, not just the surface of the heater element, has to get to working temperature. When all the surfaces are emitting IR back and forth to each other (called 'the kiln effect' after the pottery oven) air drawn through is heated uniformly without actually touching hot metal.
20 seconds is a good ballpark time for this.
Then it's time to start the draw to heat the bowl. Draw too early and you don't build the reserve heat you'll need for the actual hit. At that time you'll need energy to vape off the oil faster than the battery is delivering it, it has to be stored before in the core. This is, I think,
the first common mistake, not letting it get fully hot.
Then begin the second stage, the heating draw. Maybe another ten seconds? Pull until you've transferred enough heat to get the bowl to start to vape a bit. Then
blow all the air in your lungs (and the tiny bit of THC) to end stage 2 before starting your real hit. I think this is the
second common mistake,
accepting the lame production as a hit, blow it out to clear your lungs for the main event (taking maybe another five seconds with the power still on, replacing some of the heat you've just used).
Then, step 3, go for it. Everything is in place, the heat is right, you're ready to go. Honk on it if you want, sip if that's the goal, fill your bong, whatever. You're in control.
Good luck, guys. Keep at it, IMO it's first rate when you sort it out.
OF