This isn't advice as such, as I'm sure no-one else would do something this stupid in the first place...

I once dyed my hair purple at home, and because we had a really horrible basin and my neck hurt, I jumped into the shower to rinse it off without really thinking it through.

I ended up having to scrub the shower, and myself (!!!!) with Ajax, and I still ended up purple for weeks. Purple pubes wasn't the best look, but at least my 'cuffs and collars' matched!

I guess my advice would be, don't use Ajax to try and remove hair dye - it really really REALLY hurts and doesn't work anyway. You are all allowed to laugh at me now...