I read in a book that if you spill red wine on a carpet to pour white wine over it and it will clean it...well IT WORKS....so, since wine is made of grapes, maybe white wine over the grape juice would work...good luck
this sound crazy, but it has worked for me on a number of "impossible" stains. Slather on shaving cream -- the old-fashioned white kind in an aerosol can, NOT a gel. You can usually buy a can for about a buck. Put a big glob on the stain and work it in really well with a scrubbrush. Let it dry and then vacuum the area. You may have to repeat this a few times, but it may very well solve the problem! What do you have to lose?
I know when I had red Kool-aid on my carpet the carpet man came and showed me this trick. Take a white hankerchief or thin cloth add vinegar. Enought to dampen NOT drip. Place over spot and IRON with med. hot iron. It really works. I imagine it act like easter egg dye needing the vinegar in it. It's worth a try even though you have added many other chemicals already. good luck.
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