Welcome to OG Ben!
One thing that I can think of that might be causing this is due to poor surfactant in the fluid. This is a soapy substance that aids in proper wax flow but also prevents sticking. Does the wax harden in place too or does it sink to the bottom when cool? You may need to pop the cap on it, drain it (but save it), clean the inside of the globe really good with hot water and salt. Shake that salt water solution like no ones business while it is inside the globe, dump the cleaning mix, refill with the original wax and fluid, and you should have no sticking. If you remove the cap very cleanly without bending you can usually reuse the original cap, snap it back over the top and use a hose clamp to crimp the edges back in on the bottle lip. Hose clamp can be removed once confirmed capped and sealed again. If you find it still sticks with a cleaning you may need to boost the surfactant level of the fluid, people use small amounts of dish detergent, such as Dawn, as a stand in to the fluids that can be bought from gookits.com.
The wax stays stuck to the side after cooling but if you take a stick and poke at it it will fall, but leaves some "mark" in the spot it was. I will take your suggesstion and try that tomorrow. sounds like it should work, and since I'm off for the rest of the week, I'll have plenty of time to do it. l will update as necessary.
Yea, it sounds like the wax has formed a thin, waterproof barrier in those spots.
Excellent to hear and see Ben. Looks to flow like a true Lava Lite, nice job! You are welcome, enjoy the show!
You are correct Heidi, the larger granule should provide a better scrubbing abrasive. The fine grit of table salt can sometimes cover more area with a vigorous shake down though. Kind of like large grit sand paper and fine grit. Large grit will tear into wood but coverage has gaps per pass while fine grit will scrub more surface area per pass but not as deep. I have had luck cleaning other glass with pure acetone and table salt as well. Best to let acetone evaporate opposed to dumping down the drain, it will vanish rather quickly if left in open air.