It’s all true, except for the color of her towel and button, these are pink (but I couldn’t find my pink marker).
Lizzie adores the sauna, requests us to turn it on, and is very specific about her spot (top seat). If you’re worried, she’s free to step out at any time. She can leave without our help (we leave the door ajar as long as she’s in), and she has to press her button before we let her in.
But in true Lizzie fashion, the communication about the sauna starts ways earlier with her babbling and nibbling, pointing and tippy tapping in front of the door to the basement,… We make sure to tell her ‘sauna warm’ before the thing gets too hot and it’s a delight to see her stretch out on her bright pink towel and enjoy the session.

Mogwai and Oona sometimes stop by to check where we are, but they have zero interest in joining, and that’s perfectly fine too.