When using CDS for skin spray or patch, you don't need any water. I keep a large quantity of CDS in my spray bottle, not just 2 ml. You can also fill another spray bottle with DMSO.
Two ml of CDS is equivalent to 10 drops of MMS1 and therefore you can use 10 drops of DMSO. If using two spray bottles, estimate how much DMSO to spray compared to CDS sprayed; about 1:4. This isn't rocket science, so experiment and see what works best.
My charts are based on Jim's original standard of 24 drops = 1 ml of solution.
Your spray bottle of CDS should last a long time if it spends most of it's life inside a fridge. The color of the CDS will be an indicator. If the color reduces in intensity over time, then it has lost some CLO2.
For comparison of skin protocols, see Andreas' version, what he calls
Protocol D.