This from the Canadianorchidcongress.ca. I GOOGLED it up.

False Spider Mite: (Teruipalpus pacificus)
should be called Phalaenopsis Mite.
0.3 millimetres in length (not visible to eye).
red in color.
usual sign is yellowing of lower leaves.
green leaves will have darkened sunken area usually on bottom of
leaves.
slow reproducing pest but extremely difficult to see, therefore
infestation can be extensive.
eggs hatch in 30 days.
adult female only lays 25 or so eggs at one per day.
every leaf must be thoroughly sprayed top and bottom.
spray twice at 10 days apart.
spray with Morestan, Kelthane, SOAP, or Sunspray Oil.

Soap is probably your best bet, least harmful to humans, plants and
pocketbooks. Also, these pestshave short legs so if you put your plant
in your sink and blast it with the sprayer with lots of warm water the
mites will be washed off and will be unable to return. Do this weekly
for awhile and you will be clear.

One way to see these pests is to place a sheet of white paper under the
leaves, tap the leaves as strongly as you can, very slowly ease the
paper to the table and with a pencil circle all the tiny spots on the
paper. Wait five-ten minutes, mites will have moved enough to reveal
themselves. Don't breathe or otherwise stir up the specs or the test
will be ruined.

Keep us posted!
Joe T
Houston