I toiveled new bowls and afterward discovered some residue of adhesive from the label on the bottom of the bowl. Do I need to toivel again?
It depends on the amount of residue that is left over. If it is so small that you wouldn’t bother rubbing it off when washing the bowls, then it would not be considered a chatzitza. However if you would want to remove the residue then it would be considered that you are makbid on it and it should be toveled again. BY the way this is only applicable b’dieved if it was already toveled, however we have to try and remove any residue before toveling, to remove any chatzitza.