Think about it for a second. The main purpose of a cleanse is to rid your system of toxins which many of these include pestices and chemical fertilizers sooooooo...........................................
Its always best to go organic on everything when you can but, it is not always possible! Where I live, the organic lemons are not only $$$ but the size of a grape (HA!) it would take 5 for 2 tbs!!! I get regular ones and use vege wash!