Soapy Grapes

My husband had taken the grapes off the vine and put "Fit" (produce soap) on them and left them to sit for a few minutes near the sink. My oldest son came up and grabbed a grape and started to take a bite out of it and to his dismay it was rather "soapy". We joked with him that he was washing his own mouth out with soap! I think next time the grape feels a little slippery, he will check first before putting it in his mouth!