Crystal decanters

[Wayside2000]

How to clean the inside of crystal glass decanters

[tonylai]

put some uncooked rice inside, add mixture of vinegar, washing up liquid, warm water, then put stopper on and shake for 15 minutes. Will not cause any harm!

[elliottg]

I was going to say use hot soapy water and rinse well, in very hot water so that it evaporates when you've finished,. My partner, however, insists that you should soak in denture cleaner and hot water overnight !

[Joshua_R]

From a 1930s book for home lovers:
Fill with warm water and add a tablespoon each of salt and vinegar. Allow to stand for some hours, shake occasionally, and finally rinse with cold water.
Crushed egg shells and a little shredded soap may also be used.