I never thought that drying PLA would make a difference. I was wrong.

I would roll my eyes when people in the sub would say that even if you just open PLA, you should probably dry it.

I didn't believe it until I printed a low poly bowl - my wife said she needed one for a friend in pink (and who am I to say no, as she puts up with my nerdiness regarding this). The print came out terribly, and I threw the roll in the dryer for 6 hours and reprinted the same print. Huge difference in quality. This is Polymaker PolyLite PLA Pro.

The print was rough and falling apart a little bit. No way I could give that to her.

Those of you who dry your rolls regularly, you have made your point. Noted.

On the left, a rough print, and on the right, the same item, re-printed after drying.