I've had my Spathiphyllum wallisii for about eight months now, and I'm still puzzled by the wilting thing

I've had my Spathiphyllum wallisii for about eight months now, and I'm still puzzled by the wilting thing. Everyone says it'll dramatically droop when thirsty, but mine seems to wilt even after I water it—takes a full day to perk back up. I'm in a cold climate with low humidity, so I'm wondering if that's throwing off the usual signals people mention. Has anyone else found their peace lily doesn't follow the script? I'm trying not to overwater, but the mixed messages are frustrating.