May just use plain water thenNot sure whether it would damage the cleaner itself, with regard to cleaning atties I think you would need to remove all the orings, as I found when I've soaked my tanks in iso that it makes them swell, they become damaged. You would also need to make sure you rinse the atties well, as iso alcohol is not food safe.
Like @John R a drop of fairy & Milton or white vinegar for stubborn flavoursI'm looking at getting a decent ultrasonic cleaner to clean my vaping gear. Would isopropanol 99.9% be ok to use as a cleaner and disinfectant to clean my rtas rba's and rdas with our damaging anything?