Janet Conroy wrote:

Dave: I can do warmth and light, but I'm struggling to think of
anywhere in the house where we can create high humidity. *Would a tray
of pebbles filled with water help??

Yes it would make all of the difference. Just make sure that the base
of the pot doesn't sit in water - the roots need just as much air as
moisture and react badly to a sodden compost. Very lightly misting
the foliage daily will also help.