'Izumi' and 'Crowhurst' with yellow and wrinkled pseudobulbs

[HeatherFeather]

Hi All! First let me introduce myself. I'm new to Orchid Board, this being my first post so forgive me! My name is Heather and I'm from Indiana. I received my first orchid, a phal, 4 years ago as a gift. Since then I have acquired 3 more phals, 2 paphs, and 3 hybrids. I'm learning how to care for all of them; research and trial and error. I've only lost one so I consider myself lucky so far!

I bought these two orchids pictured in Kauai in September, the purple is an Izumi, the yellow a Crowhurst. Pictures are attached in order of before and after. Both were flowering when they were brought home. Now in what I believe to be a resting state, the pseudobulbs of both plants are shriveled and yellowing. A few of the bubls did not have leaves, a few leaves turned yellow and fell off. Are these lacking water or are the pseudobulbs just aging naturally?

Orchids are resting over a humidity tray in my bathroom facing East. And are watered once a week or so. I have lost a phal due to overwatering so I am cautious to water so often...

I greatly appreciate any feedback given. Thanks!