As far as I can tell I have it stored properly: inside 2 baggies that are inside a glass jar. I think it's been around 7 months. I usually buy a gram because that lasts me a while but this is closer to 12 ounces so it's not getting used up. It was the last I got before my friend broke up with her boyfriend who is a grower. It's possible that my body is just too used to it. I went and bought a tiny amount of something called "strawberry cough" which I hope doesn't to see if it helps. Otherwise I'll try baking as someone suggested unless rosin is not too complicated.
Thanks for suggestions.
Rosin is much less complicated than any kind of cooking IMO. Hot heavy things squish your nug with a lot of force inside of a piece of parchment, the resin from the nug is expressed from the nug and left on the parchment for collection
Think of it like pressing fruit juice, but for your nugs - that is really what we are talking about! It just happens to be dabbable juice that puts almost anything else but full melt to shame
The only difficult aspect was getting your hands on the right tools, but I know that highfivevapes and newvape now retail a number of solutions (the former have the cheapest press that would be good for personal use squishing. Take a nug, squish it, do your dab - repeat as necessary.
Get your hands on some boveda 62% humidity packs and make sure the jar is relatively airtight (comparable to a mason jar or similar). If the material is super dry, put 3 x 60g/67g 62% boveda packs in the jar with the material (if it is spread across multiple jars, more packs may be required), otherwise 2 packs should do. This will restore the moistness of the material without bringing mold and work to make sure that the material ages positively, rather than negatively. Store the jar in a cool, dark place. No light should be exposed to the jar regularly. No oxygen either. To limit oxygen presence in the jar, consider using commercial oxygen absorber packs (sort of like silica gel packs you find in various products but absorbs oxygen instead of adsorbing moisture). If your jar just is packed full by the time you get all the herb in there, then there is limited room for oxygen and this will be acceptable without oxygen absorbers.
You will probably find that you are just used to the effects of the one variety and that is why you are noticing less effect. I very much doubt you have lost all of the actives from the material due to heat/light/etc! Mold could destroy all/most of the viable resin but mold that advanced would of course be very visible to even the untrained observer! Squish some rosin from a nug, dab it or put it on top of a bowl of flowers and vape it. I am sure you will find that your old stash has new life and still gives you the desired effect
Then take the squished nugs (they look like little chips, people call them 'rosin chips') and cook with those. Don't cook with unprocessed whole nugs, you will destroy, degrade or otherwise change a large portion of the actives other than THCA/THC during the cooking process.
It is much better to extract the bulk of the resin in the most efficient/high quality way possible (balanced for your time/effort/financial budgets respectively), use that for vaporization to enjoy the full benefits of the effects of all of the various medically active compounds and their entourage/ensemble effects (unless you have a health condition that precludes you from vaping of course, but this doesn't seem relevant here lol). Afterwards, you can use the flowers that have already been extracted from to cook and exhaust any remaining actives - the more volatile fractions of your cannabis resin that would otherwise be lost in cooking were already taken out of these processed nugs when you squish them into rosin.
Have your dabs and eat them too!