So is something like dreft a no no? I bought some to wash the baby's clothes in, as I have done for my other babies...I usually do their stuff separately for the first couple of months (not even sure why) and perhaps I will return it if I can't use it for CDs. I don't need 3 kinds of detergent on my shelf!
I always just used All free and clear and would adjust the amt for CD. I never had a problem but then again I really think it depends on what type of water you have soft/hard/well. Rinse cycles are really important as well. I always did it on the hottest setting possible ( i actually adjusted our water heater so that the sanitary cycle was fairly hot) and would rinse pretty well.