Solvents and heat can both disrupt the crystal lattice resulting in the hormones liquid form. Reaching the actual melting point is not necessary, because without a solvent, as the temperature drops the crystalline lattice will begin to reform unless that temperature is maintained. Salt for example has a melting point of 1500 degrees, and that temp is not necessary to make a saltwater solution (technically a mixture) up to .36g/100g at room temp. But considering the carrier oils are also weak solvents of many organic compounds, the way water is for many inorganic compounds, I agree that heat nearing the MP of your hormone should be used to help hold the hormone in solution. The hormone is similar to a chunk of ice that melts from the outside inward and MP level heat ensures the solute is completely broken down at molecular level beyond what can be seen visually. Using high heat has the benefit of evaporating off any moisture in the powder, glassware, etc. this moisture is probably the number one reason I read so many posts about "cloudy" gear. I always mix my powder with the BA and BB and heat to approximately the MP of the hormone. I heat the oil to near the smoking point and then combine.