Hi, I was wondering if I buy a VFT if I should just put it on my window sill spring through fall and stick it in the fridge for the winter, or just leave it on my patio all year round? Being in western PA (pittsburgh) we obviously have all the seasonal changes here, but would it get a bit too cold out in the winter to leave my VFT out there? Thanks for any info you can give me. Want to get all the info I can before getting one.