Not sure where I got the recipe from (I think Amazing Scents) but thought I'd add it to the list of home made cleaning products.1 cup bi Carb soda - cooking grade ie McKenzies1/2 cup Citric Acid1/3 cup Crushed lectric Soda20 drops lemon essential oilI haven't made it in a TM yet but it's fairly simple to do by handCrush the lectric soda in a mortar and Pestle until fine grains - I'm assuming a quick blitz in TM would do the jobMix ingredients into a bowl in the order listedMix thoroughly and press into ice cube traysLeave for 1 hr, pop out and store in an airtight containerTipsDon't overfill the ice cube tray, depending on your dishwasher make and model it may not fit into the holderSet the dishwasher to tablet setting if your dishwasher has this function.