Hi,
the dental tabs are great, so are the tablets for the dish washer.
Always use the hottest water available and give it some time.
If you wish to disinfect it afterwards, use bleach (bad to the gaskets) or concentrated (important) vinegar (not nice to the gaskets, but properly flushed afterwards seldomly a problem).
There are lots of germs surviving even dish washer tablets. Concentrated vinegar is 'liquid armageddon' for most of the germs...
Kind regards,
Peter