I ran a batch last night using vinegar and it worked great. The Trent has a timer limit of 480 sec, so I ran 3 cycles using straight vinegar. I followed that with a plain water rinse under the faucet and good dry burn. Then back in the tank for one more cycle in vinegar, then a final cycle using distilled water.
The wicks came out very clean; I've only tried using one of them so far, but it's working like new.
I should mention that I remove the seal and cone while cleaning. You have to tip the Stardusts up when you put them in the tank so that they fill up with vinegar/water.
I'm very happy with the Trent ultra-sonic cleaner, it will pay for itself many times over at this rate.