I had a scary amount of mites on one of my planits in flower now. One big branch was to the point that if it got any worse they would be in the buds. I chopped that branch... and everyday I go in and spot check crush every mite I see... and if it's on a big leaf, I smash every bit of that leaf between my fingers. Don't seem to hurt the plant. Just doing it hard enough to flatten my finger surface. This way I crush eggs, or other mites I might not be able to see.
As of right now I have tried Neem... it did slow them down a lot... but did not kill them. Alcohol works great, add a bit of water and spray everywhere... it killed almost everything(not the plants). But I am 3 weeks from harvest and I am affraid that alcohol will F'up the trichromes. And a spray that reads "safe till the day of harvest" 3 in 1 Fungucide/insecticide/mitecide that really don't do **** to be honest.
I got my veggie/mother and my clone room clean of mites. I now have to wash and change clothes after I leave the flowering room. And there was one time I just washed my hands, then went into the clone room. Three days later I found two mites.
And I don't think you are seeing mite eggs. I am almost without a doubt that a human cannot see something as small as a Spider Mite Egg. It's hard enough for a small mite to catch your eye. The big adults, specially when they get dark are fairly easy to spot if you are looking for them. If you go to my thread just a few down from this one I have some pictures. You can see the mite damage, and even a mite on one of the leaves from a bud in this bud pic. Do your leaves have this type of damage? White-yellow spots?
Tips: Microscope... Handheld, easy to use with a light. $10 Radioshack. This is how I see eggs, and mites, and the condition they are in after I try something new.