That's interesting Loofers. I would have thought it would be no different to having a car seat in the car, with the heat of summer and cold of winter.
I've reused most of the stuff we stored in the attic. Having 4 it would have been too expensive otherwise!
Twiglett, your mum is from another generation, and obviously has very different ideas to you. Doesn't mean she is right though, so go with your instincts.