Watching your parents house seems to be very stressful :-) I can confirm that switching locations has en effect. But I thought (and belive) that´s realy a kind of stress...
I was wondering similar this week, at work, an AC regulated control room, I have medium/low stress all day, but almost as soon as I get off my bike and get home it drops to rest. It's super dry at work, often between 18 and 30% relative humidity which is awful, so I suspect that.
