Hm,. yes. I thin that's standard practice for most people (the ones I know of anyway), unless a whistle arrives very dirty and neglected but that is very rarely the case. There is really no need to disinfect your environment all the time, use bit of sense and you'll be fine. What doesn't kill you makes you stronger.I don't do anything when I buy a used whistle.. I just play it.
Can you be too clean?
Hygiene hypothesis