A couple of years ago I remember a thread on this… went just fine from what I recall, however, they held the stones in the top of the ultrasonic cleaner while it cleaned them instead of dropping them in the solution. From what I have scarcely read this can cause some health issues possibly. And if you drop them all the way in it could lead to issues w/ the glue/tape coming undone.
Personally I just use a squirt of windex as I need it while sharping. this eliminates dust and cleans the stones all at the same time… they never become clogged.