I have used cocoa powder before and have not had that problem but it was not sweetcakes fo ,though. Just keep notes on what you did. Notes are very helpful if you want to refer to a certain batch you made. Believe me, you may think you will remember but after a time all the batchs seem to blend together. One other thing I do - is when I have a certain fo react differently in soap ( accell trace, in this case change color, etc) I make a note right on the fo label that way I have the info in front of me when I go to choose it. Happy Soapin'