I had the same issue on my 2012. I bought it in an auction and it was sick, so I rigged up a duster type thing. I bought 4 feet of 2” air hose that you use for a fish tank and hot glued one of my kids bouncy balls to the cleaning end so it had some weight. I wrapped the cleaning end with a car wash sponge using fishing line. I wrapped it really tight because I was paranoid the sponge was going to come off and then be stuck somewhere down in my vents for the rest of time lol It worked awesome and got the majority of the initial dust out. I couldn’t get the defroster vent or the floor vents though, only the driver and passenger ones. I blasted all the vents with a steam machine. Couldn’t smell the dust much afterwards.
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