Can you help identify what’s eating my phalaenopsis orchid leaves? I can’t see any bugs.

Question

I enclose a photograph. This is the worst leaf and I’m worried about the plants’ futures, although they don’t look to be suffering as yet, but it is spreading.

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Answer 1

This looks like damage from Thrips.
These articles will help you.
https://www.gardeningknowhow.com/ornamental/flowers/orchids/managing-orchid-pests.htm
https://www.gardeningknowhow.com/plant-problems/pests/insects/controlling-thrips.htm