I use these and really like them.
A handful of ice cubes, couple tablespoons of kosher salt and a lemon cut into 4-6 pieces. Shake vigorously.
Works every time.
This Dawn Powerwash spray is the only thing that worked to remove red wine stains (the result of decades of use) from my Reidel Vinum wine glasses:
Baking soda and white vinegar. More baking soda than vinegar. Let soak for 8 hours and rinse out.
First try washing it with a little bit of food grade citric acid (can get on Amazon). If that doesn’t work, cut a magic eraser and rubber band the piece to the bottom of a bendable wire. Works great for getting out the stains on oddly shaped decanters. Then just rinse. We also use magic erasers for removing wine stains in bottoms of stems.
Urnex Cafiza - used for coffee machines to get coffee sludge out. Works great with decanters. Hot water, let soak for 15-30 minutes then rinse thoroughly.
For the denture cleaner method, how many tablets? Directions are one per glass; flecks of stain require me to fill it most of the way.
ALL OF THEM!!!
Scale up from the one per glass. I would assume 1 tablet per 200-300ml and figure how much volume in decanter
This works best for me and leaves no scent or residue. Great for getting out the tough stains.
I came here to say this. A guy in Bordeaux taught me this and now I keep Efferdent on hand just for this purpose.
Another option: you can try rubbing alcohol and kosher/rock salt. Just dump in a palm full of salt and squirt in the alcohol and swish around. Rinse with fresh water and repeat as necessary.
I have a similar decanter that sees little use for this reason, but have had good success with white vinegar and hot water in the past. cheers.
The decanter beads are intriguing, might try them next time.
Denture cleaners worked like a charm and super easy, no swirling or effort beyond rinsing.