Yeah the 'dirt' is now in the wort and in your gut....
I hose mine off and hang dry, on occasion I'll hit it with a SS scrubby to break through the beer stone build up. Every year I give it a 20 minute soak in Star San or vinegar. I've used the same IC for 6 years and no issue yet.
I brew the best beer around.... don't believe me, ship me a keg of your finest and I'll email a picture of me testing your beer with a write up....
OnTap: Rocky's IPA
OnTap: Wife's Ale
Fermenter: Vanilla Porter, Riley's Smile, Mead
OnDeck: Wifes Ale, J da Arrogant Bastard, Js Pale Ale, Rocky's Bark