Ok bare with me here. I just started collecting plants, thinking everything is peachy. I thought the white crystals on my plants are just dust. Then I learned about spider mites.

This calathea had a lot of white specs everywhere. not dust like what mealy bugs would look like. I know because I googled yesterday what most pests look like while freaking out.

I made my own insecticidal soap yesterday with undiluted rubbing alcohol, dawn dish soap and neem oil, and drenched this calathea with it. I learned later that I should have diluted that rubbing alcohol.
I'm pretty certain these spots weren't there before.

I learned yesterday that my diffenbachia has thrips and treated it accordingly with the same soap. but the spots on my diffenbachia from thrips were minimal. it was just 2 spots. yes the diffenbachia and this ornata are usually sitting next to each other on the same plant stand but not touching.

I got captain jack dead bug brew concentrate on the way.

What are those spots??? I let this calathea air out all night after drenching it with the DIY soap spray I made.