Wrinkling Odontocidium bulbs

[Narnia]

I just got this Odontocidium a couple of weeks ago from a Trader Joe's. I have it about 6 feet away from a west facing window in the "hot" room of my apartment. Really, it just doesn't get access to the air conditioner, so it's hot for a few hours in the afternoon during the summer. The thermometer has said it's about 85 - 90 F. I'm watering it weekly and misting the medium/roots at least once during the morning and once in the afternoon if it's hot.

The bulbs were not wrinkly when I got it, and now I am definitely seeing some wrinkling in all of them. It's not major, but it's definitely there. Is this a water issue? Heat issue? Light issue?

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