Oh, I should mention the carpet is not white-white, but more a light beige so bleach won't work.

Have you tried Hotshot carpet cleaner? It's pretty effective. The only other thing I can think of is something like Tide mixed with water or Oxyclean.

Can you contact Wilton and see if they have any suggestions?

What about Nature's Miracle, sold in pet stores. It worked on a couple of really tough doggy and kitty upchuck stains on my carpet. I'd suggest testing it out in an hidden corner first.

Spot shot it comes in a blue can with Orange on it. The best stuff I have found, I get it at most grocery stores and walmart. Also good is one that looks like 2 canisters together with a spray handle and has Oxy clean in one canister.

I've had good results from Incredible. Got it at Bed bath and Beyond.

Try Wine Away, I have used it for red stains other than wine and it has worked.

The spray can is best.. For spot shot

The other is woolite power shot with oxi deep

Here is a link that might be useful: spot shot

I said hotshot...meant spotshot. It's really good.

Hmmm...maybe as a last resort try soda water and borax? I know borax is a bleach of sorts but at this time...what the heck? I would try putting on the powder and adding the soda a little at a time, have LOTS of papers handy to soak things up should it get out of control and water to dilute the effects.
Just my 2 cents worth.
Wish you luck :)

I've found that a carpet cleaning machine (I have a Bissell) and their premade solution works best to get out the tough stains. I used to use Spotshot, but find the machine works even better.

I second the Spot Shot. BEST stuff ever! I've used it for years. It's taken red candle dye out.

This worked for me..go to the web site and read what people are saying about it.

Here is a link that might be useful: Cleaner

Oxiclean...straight from the spray bottle...is the only thing that works with my cat's carpet "contributions"...and she's getting on in years so her "contributions" have grown of late.

Unfortunately...you've already applied so many "remedies"...including vinegar which may have set the stain rather than doing what you wanted it to do...that you may need a professional's opinion. If your carpet is 100% nylon...you have a better chance of removing the stain. Nylon doesn't absorb color the way other carpet fibre does. Any other fibre and you may be stuck with the stain now. So sorry.

Anne

Don't know if this works, but I am going to try it on my carpet tomorrow. At this point, it seems as if you have tried them all, so this can't hurt!!!!
BTW, I found this on Pinterest, and I have no affiliation with the poster.

http://www.onegoodthingbyjillee.com/2011/12/homemade-carpet-stain-removerno.html

I've used Spot Shot many times. It always works. However, my dog has "accidents" near the back door if I don't let her out fast enough. I used Spot Shot there but it left whitish "rings". I had a professional carpet cleaner in this week. At first he thought the carpet had been bleached, but when he cleaned with his machine, it came out perfectly clean!

If the stain never comes out you can always patch it. Last ditch effort. Find a hidden area of carpet with same aging and cut a circle. Match the circle to the spot. I use carpet thread and a round upholstery needle to whip stitch. You can't see the added patch. Wash the stained one well and patch the other one taken out. Did this when selling my house and a darn red candle dumped over on my off white carpet. You could try this in the back of a closet to see if it would work for you.

Does anyone know if Ritt Color Remover works? It is primarily for dyes, not used on professional colors for stripping.

I have used "AWESOME" and it is sold at the Dollar Store .I have had good luck with some awlful stains, through boys being boys. It also works to take off grime in the shower, and many other things...D

Best thing to do is to call a professional. Chem Dry type of business have a special treatment for red dye - they cost extra, a lot extra, but it's less expensive than new carpet.