Aren't support groups wonderful? You, like the rest of us, were almost paralyzed by a bad case of "sensorcleanophobia" - but now you're free!! Dust happens, there's no escaping it. But the knowledge you've gained will empower you to live free from the fear of that next spot!
Seriously though, sound knowledge put into action is very empowering. We are all glad to share what we've learned; and on this issue, you can now do the same! That is what makes Nikonians such a great group!