Since you report that the glow was gone when using the 19mm Pan it stands to reason that the glow was caused by internal reflections or light scatter inside the Baader 8-24 zoom. Part of what you pay for with premium quality eyepieces is better control of stray light / light scatter / internal reflections, which is accomplished by internal blackening, better lens polish and better lens coatings, etc.
The most common causes for "glow" or light scatter around planets I have experienced are (in no particular order): atmospheric conditions (haze/light pollution, etc); fogging of optics (main objective and/or eyepieces); poor quality filters (one I tried once caused an almost unbelievable amount of glow around the Moon); using a poor quality erecting prism diagonal (erecting prisms can cause a lot of glow/glare/spiking artifacts that a normal star diagonal doesn't); internal reflections/light scatter in eyepieces. Tube currents during acclimatization can also cause poor performance but I haven't noticed any glow caused by that, but flaring around bright objects is very common in my 4" refractors during their acclimatization process, and usually lasts for 45 minutes to an hour under my observing conditions.
Diagnosing optical problems usually involves swapping components in the optical train one by one, ideally also trying to remove the diagonal and observing straight through to eliminate any artifacts introduced by the diagonal.
You don't mention the color of the glow, but one point worth noting is that your C102 is an achromatic refractor, so some modest but visible amount of blue/violet haze around bright objects like planets (and Jupiter in particular) is to be expected due to the blue/violet colors not being focused. This is not a defect of the telescope, but rather a property of the optical design of achromatic refractors.
Edited by db2005, 31 August 2019 - 11:32 AM.