As above, definitely try drying it.
I use a food dehydrator, with a circular cutout in one of the trays so I can fit the filament spool.
As for the whole question of how PLA ages, well, different brands age differently in my experience. But I’ve noticed that the Lulzbot PLA has a definite tendency to get very stiff and brittle as it ages. Drying it will improve its characteristics a bit, but it will quickly revert to being so stiff that it’s hard to pull it off the spool, even if it’s kept in a dry-box at 10 to 20 percent humidity. I’ve tossed the last 100g or so from the last two spools of PLA because they just became too much trouble to deal with.
The manufacturers certainly attempt to package them to keep them dry (it costs them $$$ every time they have a customer return to deal with!). However, the plastic bags don’t seal perfectly either – and of course, nothing can fix the stiffness/brittleness of ageing, which I suspect is just inherent to PLA (and perhaps other plastics).
I’ve had better luck with other PLAs – in particular, the eSun PLA-plus series seems to be more flexible, and little tougher (less brittle) than ordinary PLA. It still needs to be dried, and kept dry, but it’s now my go-to PLA.