Had a similar wake-up call last winter around 3 AM—pipes froze solid and the main shut-off valve was completely stuck. Ended up scrambling around with a hairdryer trying to thaw the pipes enough to stop the flood. Not fun. Now I do exactly what you mentioned, turning valves regularly and adding a bit of WD-40 every now and then. Lesson learned the hard way, I guess...
"Ended up scrambling around with a hairdryer trying to thaw the pipes enough to stop the flood."
Hairdryer method—classic! Reminds me of the time my roommate and I had a similar midnight plumbing fiasco. Middle of January, freezing cold, and suddenly we had water gushing out from under the kitchen sink. Neither of us knew where the shut-off valve was (rookie mistake, I know), so there we were at 2:30 AM, frantically watching YouTube tutorials on "how to stop kitchen floods" while ankle-deep in ice-cold water. Eventually found the valve behind a panel we didn't even know existed. Fun times...not.
Now I'm pretty obsessive about checking valves regularly too, though WD-40 is new to me—I usually just give them a turn every couple months. Might try that next time I'm doing my rounds. Funny how one late-night disaster turns you into a plumbing maintenance pro overnight, huh?
Hairdryer's fine in a pinch, but honestly, isn't prevention better than scrambling around at 2 AM? Have you considered insulating your pipes properly or installing heat tape? I've managed several properties in cold climates, and trust me, a little upfront effort beats late-night panic every time. WD-40 might help valves turn easier, but it won't stop pipes from freezing...just saying.
