I use the Planet Waves Humidpak system on my Taylor. I always store the guitar in the case with the humid pack until I'm getting ready to play it. When I'm ready to play it, I take it out of the case and I usually let it acclimate for a bit, sometimes not, no difference in sound or playbility. And, I always lay the guitar flat when it's in its case. When it's laid sideways or standing up, it effects the action because the setup is on the razor's edge so any variation will cause fret buzz.

When the guitar arrived new, it was dry as a bone. I put the Humidpaks in and a few days later, perfect. Zero issues with the guitar and the guitar sounded dramatically better after being properly humidified. With the packs, it plays the same every time.

Taylor highly recommends the Humidpak. You don't need to measure the temps or humidity, just drop the packs in, done.