Phalenopsis parishi new leaf with weird pitting

[Dimples]

If you rinse the plant foliage once every 1-2 weeks with a forceful spray of water (shower or sink sprayer), that will knock off most of the mites. It won't eliminate them, but regular showers will keep the population in check.

For truly terrible infestations on plants that are irreplaceable and difficult/impossible to wash, other treatment options include spraying with 70% rubbing alcohol, horticultural oil, or horticultural soap on a schedule, but for most indoor plants that's overkill.