Dust bunnies at macro level

Macro shot of my hair.

Talk about dirty!  This morning while I was combing my hair, I picked out one strand of hair from my comb.  It was interesting looking because the tip of the hair was white (yeah, I have gray hair since I was 24) and the base of the hair was black!  This was a second time I saw one of these hair strands like that.  Am I getting younger???

In any case, it was interesting enough I had to take a shot of it to document the anomalous growth.  I decided to use the Nikkor 105mm lens.  I thought it could do 1:1 reproduction but for some reason I could not get really close to the hair so I added an extension tube.

What came out was a little surprising.  Yes, I got my shot to demonstrate the weird change in colour but I also got a ton of dust dunnies in the photo!  All those really dark spots in the photo are dust bunnies!  They do appear at f/32 on my 18-200mm lens but they are a lot more apparent at the macro level.  Holy molly, I initially thought they were black spots on the paper that the hair was taped on but no, those were on my sensor!  Ok, time to do another wet cleaning.

Why do I get so much dust inside my camera???