Does my camera need a service?

[JTP]

I'm running currently a Nikon D80 that has just recently passed 21,000 photos.
I bought it new when it was current, and since then I have only had the sensor cleaned once.

This wasn't a service, just a clean.
I'm now at the point where if I shoot at anything smaller than F11 dirt shows up on my frame. Shooting at something like F18 - F22 shows copious amounts of dirt.
Other than that it's performance over the last few years has been amazing.
I wish to continue this awesome performance. Should I send it in for a clean and service?

[JM Tran]

camera itself doesnt need a service as it is still very young at only 21k actuations according to you

all you need is a sensor clean which should be anywhere from $50 to $100 bucks depending where you go, APSC sensors are a bit cheaper to clean than FF ones.

[Viper]

You might consider getting a blower brush. Cheap on ebay.