Re: Pollen Storage
Best of all is deep freeze.
2nd best is to dry it. For commercial pollen production moisture is measured electronically, but for your own use at home it can be considered dry when the grains are hard enough to be difficult to crush between your fingers.
You are correct it can deteriorate, it can go mouldy in just a few days if left in damp conditions at room temperature.
44 years, been commercial, outfits up to 4000 hives, now 120 hives and 200 nucs as a hobby, selling bees. T (mostly).