The solution(no pun intended) to your problem will depend on how much you're making at one time and other things as well.
Get Propylene Glycol
Get Ethanol
Get glass dropper bottles (pay attention to ml size of the bottles)
Get Heatgun
For example;
You have 30mg weighed out that you're putting into a 15ml glass vial,
put it into the glass amber bottle, (take out the dropper and replace rubber cap for more volume when agitating and less interference)
add drops of ethanol into bottle slowly until the bottom surface of vial is covered,
fill rest of bottle up to neck with propylene glycol,
Put cap back on and shake, after shaking a good amount immediately hold bottle up to a very bright light source and watch whats going on inside.
You're looking for specific things;
After you've shaken the bottle and are watching it closely you will start to see air bubbles and the compound; The compound will slowly travel down, and the air bubbles will slowly travel up. This is how to distinguish between them because sometimes they can be mistaken for one another.
On your initial mix you are looking for the compound, looking for it to settle on the bottom. This is called the Precipitate. This is what you want to avoid and it is a good thing tounderstand what it looks like.
Grab the heatgun. Some brands will be ergonomically designed in such a way as that they can be laid flat on a surface stably with the heat pointing upwards. If this isn't the case, you can sit and hold it between your thighs upright.
Agitate(shake) your vial containing the precipitated solution and slowly heat the vial by holding it above the heatgun. I recommend wrapping the top of the vial, which you hold on to, in some kind of small towel to not burn your fingers. This will also help you work with the vial when the glass is very hot.
Now keep agitating, heating gradually (while turning the bottle so it is evenly heated), agitating heating gradualy, agitating heating gradually and so on.
During each one of these cycles, agitate the vial and look into it to see where the precipitate is in the process of dissolving. After several of these cycles you should see less and less precipitate.
Once the majority of the precipitate is dissolved and no longer visible in the solution, wrap the vial in the small towel and wrap that towel in another towel and let it sit for 2-4 hours. When you come back it should still be warm and the precipitate should fully have dissolved.
You can also submerge the vial in boiling water as an alternative source of heat.
Please be careful and triple check your measurements, (presume there is double than what has been calculated) keep a clean work area, wipe it down after you're done. Label your vials. Don't drop the vials because you burn your hands, don't heat the glass up too fast or the vial may crack.
Good luck man, I hope one day you can live life sober with Christ.