I’m on mobile and can’t really see that clearly, but it could be thrips or spider mites.

Neem oil once a day for about a week. Try to do it at night or evening, I’ve burned some plants by applying neem oil during the day, while the sunlight was hitting it.

First, you’re gonna need an old priest and a young priest…

I’m sorry, I have nothing useful to offer.

Does it come off when you wipe it with a wet paper towel?