I... don't... think that is how it works.
I cure in glass - no gas exchange - and I'm not locking in any bad smells. Lemme find a pic...
Start with a proper dry
View attachment 1313732
Then cure in these
I can get you better pics later.
The vast majority of any hay smell is removed during the first week in the drying stage. If I have an especially wet grass smelling pheno, I can throw it in the freeze drier and the smell is completely removed overnight.
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that's the freeze drier that got caught in the pic by accident behind the light bars.
What I am trying to explain to you is that you may have created some of your own issue with the way you treated the plant before harvest, how you harvest, and then how you dried and for sure how you are curing.
I can take a hay smelling plant and turn it into a "cured" good smelling plant overnight by using vacuum and freezing to remove all the water, and the chlorophyll comes out in the water.
After the run is done, you have to defrost and drain the freeze drier. That water that comes out smells really bad like a mixture of hay and I dunno, medicine? Guano? Just don't drink it.
If you don't have a freeze drier, what you do to dry and harvest will impact your sniffer.
I'm not sure what else to say here, except leave the damn bags closed and let them do what they were intended to do. Short of that - you get what you get.
You need the natural process of breakdown of chlorophyll and other non-beneficial compounds to occur, and your job is to encourage that. The way you are going about this is not encouraging the best product. This is not about groove bags at this point, it is about understanding what is happening in a cure.
Oh, and I don't burp my glass either. If you have to burp, you didn't dry properly / completely or did it too fast and there is uneven water amounts in the buds.
I've got pics, data, and video of this whole process somewhere, I'll dig it up if anyone wants to see it.