Well here in Canada stuff freezes so I haven’t had that problem, eh.
But I did have this toy as a kid, like one of those battery powered truck things and I forgot about it for a year or two and found it with exploded batteries.
I’ve found out I can shape my back with this one chair I sit on 24/7. I usually just slouch on it but if I put this dumb bird volleyball thingy on it then lay on top of it in the chair, my spines curvature changes.