Ok so I wash the dishes by hand all the time because we don't own a lot of dishes so don't have enough to do a full load each time, and the dishwashing liquid got chucked out with everything else.
Attempting to use Dr Bronners Peppermint on the dishes though really failed. It just didn't cut the grease and the dishes seemed to still be greasy afterwards. I tried adding vinegar to the mix and lemon juice but it just didn't work for me. So instead I researched on non toxic eco dishwashing liquids and bought Ultra Dishmate which was highly recommended.