You need to look at that link
http://www.ardentcannabis.com/education/decarboxylation-myths
My experience is that MBM's heating element, located in the pitcher base, goes up to the same hot temperature, regardless of lid temp setting, and then when the contents have reached the lid setting temp, the super hot heating element shuts down.
Herb in the bottom of MBM, directly exposed to the heating element, can scorch. I can actually hear the alcohol boiling in MBMs @ 130 F when I first turn them on, even tho alcohol boils around 175 F, and if the lid doesn't fit exactly right, the alcohol level boil off to zero, and the herb scorch.
Of all the safe, commonly used solvents for home users, Vegetable glycerin is by far the worst, and can lead to wasted herb.
Oils are much better, but even strained butters lose about half the medicine to the straining process.
By far the best solvent is 190 proof everclear grain alcohol, which can remove almost 100% of the medicine with sufficient soaking.
Almost every good recipe requires that the herb be decarbed, and 240 F for 40 min is optimal.
The decarbed herb is now as potent as it will ever be, and any attempted infusion heating will degrade thc.
There are a few things you can do with decarbed herb that has been ground to powder:
(1) Mix with nut butter or nutella and use.
(2) Mix it into the oil of any recipe. I like the $1 betty crocker muffin or brownie mixes, and put the batter into mini-muffin cups, carefully weighing them to get accurate dosage.
(3) Soak with EC190 for several days with frequent shaking to make tincture which can be reduced to feco and added to anything.
The only thing I now use my MBMs for is to aid in making the tincture, and then only its grinding/stirring capability on the No Heat setting. Item (3) above eliminates this need, but is less covenient.
