Warm weather, and the Nixie clock is suddenly very accurate

My Nixie clock in the Lab is suddenly maintaining time to the second. It's controlled by a crystal, and always has run a little bit fast since I never got around to putting a trimmer cap on it. Now I know that crystals age; the mechanical stress it is under when mounted relaxes over time; purities move within the crystal, and the crystal itself might lose a bit - or gain a bit of mass as crap floats around. It's not oven controlled or anything - just room temperature controlled, and now, it's fantastic.

I was talking about replacing it and building a new one. I wonder if it heard me?