this problem has just been on truckmounters,
apparently the fabric youve cleaned is susceptible to acid rinse, from what ive read, if you go back and blot a small area with a high alcali ph it should turn back to green, if so then i suppose you just rinse with a high ph all over and problem should be solved, there was also a mention of using bicarb, if someone else doesn't help with this problem then i'll read the thread more thoroughly and advise you accordingly, but i think the alcali rinse should do the trick. shaun knows more as he joined in on the topic.
hope this eases the stress, it can be rectified.
derek