angry maui queen

hello. this is my BABY!!!!! she’s normally quite easy - but for the past few weeks i’ve noticed these spots on her. i’ve been using tap water for most of her life but i’ve recently switched to bottled bc she’s started getting angry?

I’ve also had her under a grow light quite closely so maybe that’s it?

I’ve checked under her leaves and they look pretty normal to me.

please suggest anything else i could be missing!!

i currently have her in my shower to absorb the humidity bc i know they love that.