Seeding/seedling leaf marks, transparent showing to underside

[orchidhope]

I have four phaleanopsis seeding/seedlings in my nursery air conditioned room (my 35+ collection is outdoors on a 3-sided open covered porch with UV screening to limit sun and light exposure, where here in the upper keys I am told it is too hot at 90 for the seedlings), so I am meticulously caring for them in air-conditioned 78-degree indoors facing an East window with shear curtain protection from the morning sun's rays and am taking immense joy in watching the little guys grow, producing new leaves and roots.

But one of them a Phalaenopsis tetraspis C2 selection has my concern with creamy elongated tiny,tiny capsule-shaped marks that I believe you can see through to the underside when held up to the light. Not surface, topical marks. Not raised but almost like the chloroform is leached out, if I am making any sense in trying to describe what I am seeing.

Comments and advice on treatment please. (Sprayed today with organic insecticidal soap.)