Hey there Friend!  There are a few tweaks I would personally make here.  These are meant to open up the nasal passages with that nice hot steamy water when placed in the shower floor.  These are really nice. 

However as I used these shower discs I noted that I would indeed add more vapor as well as a little less water.  With more water they tend to become real hard which makes them hard to dissolve.  Those are the only two things I would change.  They are really nice in the winter months. Recipe is at the end of the video, Enjoy!