I'm so sorry about your dad! I have done lots of research on the internet on cancer, and found that the sauna is good because the cancer cells destroy healthy cells as well as their connective tissue. That makes the cancer cells closer together, so they react more to heat. I have a medical grade ozonator and run ozone through water for 1/2 hour a day, and also put the ozone in the sauna so it can get in through my skin. Also good is Essiac Tea and coffee enemas.