phalaenopsis in hollow log

[GPeach]

my first phalaenopsis orchid rescue! i bought her in 2012 for $4.50 at kroger in the 'manager's special' basket. she looked sad, only asking for a little water and TLC. look at how she repaid me! THEN...
i repotted her in a hollow log. everything was going well til this winter. i moved her into my bedroom when the temps dropped. from a south window to an east facing. she still spiked. but, i noticed a bud fell off. and then another. i moved to the window with 4 flowers and then lost 2 more buds. i moved away some of the bark medium to check out the roots. i think maybe she is too dry. nothing rotten down there but, air roots look shriveled up even though i mist several times daily. also, her leaves started to get 'floppy' and sort of shriveled.
i'm thinking maybe i should place some spagnam moss around her roots deep to hold some moisture in. when i pour water in, it just runs out very quickly. it doesn't hold moisture at all. i only used phal bark to repot after removing all of the packed moss she came in.