nph

I have never tried to winter a banana pup indoors before here in Texas. For several years I have had bigger plants in my garage. However this year I had the pleasure of visiting Going Bananas and after that had to buy a few pups and plant them indoors.
However even though they are in a south facing window in the bath room it is a pretty cool location and there even a draft from the window.
My Viente Cohol looks terrible, the Kandrian slightly better and the Icream looks quite good and grows.

I have another south facing window upstairs, but not quite as much light coming through but close.
However this room is much warmer.

What do you suggest moving the two that doesn't look weak (getting brown and not really pushing new growth, maybe 2 inches since I planted them) to the warmer room? It is probably 5-7 degrees warmer upstairs, could that be too hot and dry for them?

I keep reading that bananas indoor go bad if spending winter in warm and dry air but it right now it seems cooler air doesn't help.

Any Advice?

Thanks.