One curious thing I noticed in your description - you said it doesn't smell. In my experience, new purigen has a distinct odor.
when i pulled the bag out of the filter, it smelled kinda fishy. Not trying to be stupid there!!! It smelled like when you are down by the ocean, that saltwater aroma. That was after I pulled it out. Don't think it had a smell when new, although there was a bit of dew/fogging in the sealed bag before I opened it.