Place corn starch in a bowl, add the Vicks and mix it around until well combined. (This will be strong smelling so maybe wear gloves if your sensitive or open a window.)Now add the baking soda (and glitter if you are using it) and mix well. (IF you find you need more moisture add a tsp at a time use care not to over do it though,or tablets won't form right.)Put the mixture into your ice cube tray to other molding tray, and freeze it for a few hours.Take out and pop out of the molds.Store the homemade Vicks Shower Tablets in small airtight jarsJust place one in the shower near the drain. The steam will fill your shower and help clear your congestion.