Undiluted CDS should be kept cold, but for an all-day bottle of CDS, it is diluted with water. You can compare all-day bottles of CDS and MMS1 - both will lose a little CLO2 gas when opened. Be sure not to leave the bottle cap off any longer than necessary. It would be better to use an all-day bottle than no MMS1/CDS. People have recovered from serious diseases for years using an all-day bottle of MMS1. It is just recently that Jim says making MMS1 doses each hour would be best. I have not seen any testing or testimonials to prove that claim.
For your skin cancer, I would take MMS1 internally and apply undiluted CDS + DMSO topically. Don't forget the other protocols that you can include along with ingestion and topical treatments.
If you opt for taking CDS internally, when dosing gets high, you will probably notice throat irritation due to the high amount of CLO2 in CDS, whereas MMS1 and CDH contain much less CLO2, externally.
You can use all three SCSs; MMS1, CDS and CDH. They all contain CLO2. It is also thought that unactivated MMS can be used by the body and not just activated with stomach acid. Also, check out unofficial
Protocol 102
that I wrote.