Hot Tubs - Do you drain between guests???

[John Majoris]

For the hosts that have hot tubs, how often do you drain them? I've read a few older posts here where host's drain their hot tubs between every stay. I just drained and re-filled our 400 gallon personal hot tub, and it was a 2 day event.

Is there a particular manufacturer that makes a good STR Hot Tub? I'm mostly concerned about a guest inadvertently down cycling it and putting it into economy mode which turns the heat down low, (which I fat-fingered by mistake on our hot tub when we first got it...)

Maybe a Hot Tub that you can lock the screen so the ham fisted and kids among us can't screw up the settings???

Or is that something that never happens in real life? 

Thanks!

John