What's eating my alocasia?

Looking for the wisdom of the more experienced. I have what I think is pest damage on my alocasia. I was suspicious of spidemites, but haven’t visualized any pests on the plant. I have been showering it and treating with insecticidal soap. The last leaf came out facing upwards and bowed, and it’s working on a new leaf now. It’s been next to another alocasia (that I’ve also been treating), but I’m not having issues with it. I also did accidentally let its water reservoir go dry. I don’t think that helped anything, but I don’t think it was the cause.